obsn,year,qtr,r,y,pi
1,1950,1,0.51,11.53832,0.5
2,1950,2,0.51,11.53832,4.06
3,1950,3,0.55,11.56103,5.5
4,1950,4,0.623,11.601046,9.85
5,1951,1,0.693,11.619265,14
6,1951,2,0.75,11.601156,11.67
7,1951,3,0.803,11.5962,8
8,1951,4,0.913,11.597634,3.26
9,1952,1,0.907,11.648575,3.39
10,1952,2,1.013,11.675044,-2.93
11,1952,3,1.11,11.688122,-2.58
12,1952,4,1.233,11.721824,-1.07
13,1953,1,1.44,11.719907,0.08
14,1953,2,1.597,11.733474,0.71
15,1953,3,1.823,11.728875,2.01
16,1953,4,1.903,11.746637,1.26
17,1954,1,1.74,11.703083,0.98
18,1954,2,1.583,11.711186,1.65
19,1954,3,1.303,11.725615,0.81
20,1954,4,1.237,11.744672,-0.65
21,1955,1,1.007,11.773596,0.99
22,1955,2,1.277,11.800627,-0.62
23,1955,3,1.6,11.825076,-0.8
24,1955,4,2.33,11.847997,-0.38
25,1956,1,2.563,11.875177,1.46
26,1956,2,2.767,11.886033,2.53
27,1956,3,2.847,11.893442,5.3
28,1956,4,3.433,11.924426,3.79
29,1957,1,3.723,11.919883,3.18
30,1957,2,3.763,11.918177,3.76
31,1957,3,3.907,11.925247,1.58
32,1957,4,3.717,11.914998,0.46
33,1958,1,2.99,11.914891,5.29
34,1958,2,1.66,11.936466,4.15
35,1958,3,1.54,11.949631,-1.18
36,1958,4,2.98,11.962624,1.17
37,1959,1,3.733,11.963848,1.8
38,1959,2,4.883,11.974544,1.22
39,1959,3,5.593,11.985376,0.4
40,1959,4,5.01,11.994759,2.35
41,1960,1,4.457,12.014525,-0.44
42,1960,2,3.047,11.995105,1.87
43,1960,3,2.567,12.010252,0.86
44,1960,4,3.227,12.013555,1.17
45,1961,1,3.153,12.005595,-0.04
46,1961,2,3.09,12.033123,0.09
47,1961,3,2.503,12.050518,0.27
48,1961,4,2.59,12.066765,1.57
49,1962,1,3.093,12.094784,1.3
50,1962,2,3.64,12.095901,2.17
51,1962,3,5.217,12.111014,1.64
52,1962,4,4.1,12.128759,1.49
53,1963,1,3.71,12.135221,2.27
54,1963,2,3.38,12.147511,2.36
55,1963,3,3.56,12.15745,2.66
56,1963,4,3.64,12.192156,2.01
57,1964,1,3.817,12.210881,0.61
58,1964,2,3.657,12.214973,1.17
59,1964,3,3.737,12.229945,1.52
60,1964,4,3.76,12.23536,2.64
61,1965,1,3.737,12.265605,1.04
62,1965,2,3.817,12.275319,3.41
63,1965,3,4.063,12.289917,2.05
64,1965,4,4.253,12.315411,3.24
65,1966,1,4.72,12.338048,4.92
66,1966,2,5.083,12.351557,5.35
67,1966,3,5.06,12.354337,1.6
68,1966,4,5.13,12.365535,4.4
69,1967,1,4.57,12.363401,3.57
70,1967,2,4.147,12.383281,4.6
71,1967,3,4.367,12.387627,4.76
72,1967,4,5.263,12.390708,3.92
73,1968,1,6.47,12.40085,5.43
74,1968,2,6.873,12.426027,4.51
75,1968,3,5.897,12.44334,2.83
76,1968,4,5.74,12.462605,3.64
77,1969,1,6.43,12.469882,3.4
78,1969,2,6.813,12.475306,6.54
79,1969,3,7.62,12.488601,3.06
80,1969,4,7.723,12.508279,4.33
81,1970,1,7.607,12.50671,5.22
82,1970,2,6.407,12.501634,2.4
83,1970,3,5.63,12.518867,0.37
84,1970,4,4.827,12.517667,1.53
85,1971,1,4.133,12.526546,1.51
86,1971,2,3.087,12.557096,4.43
87,1971,3,3.797,12.58663,3.48
88,1971,4,3.45,12.597141,4.03
89,1972,1,3.427,12.593944,3.7
90,1972,2,3.637,12.620867,3.99
91,1972,3,3.507,12.624678,5.6
92,1972,4,3.613,12.651527,3.92
93,1973,1,4,12.681971,5.37
94,1973,2,5.07,12.690977,7.98
95,1973,3,6.03,12.694358,9.48
96,1973,4,6.45,12.721265,7.41
97,1974,1,6.223,12.731168,9.53
98,1974,2,8.017,12.736936,12.1
99,1974,3,9.013,12.742964,11.03
100,1974,4,7.883,12.75014,13.76
101,1975,1,6.427,12.749083,8.86
102,1975,2,6.8,12.758428,7.75
103,1975,3,7.793,12.773192,9.88
104,1975,4,8.443,12.783001,7.14
105,1976,1,8.777,12.805601,7.64
106,1976,2,8.967,12.828153,5.57
107,1976,3,9.037,12.835012,5.6
108,1976,4,8.787,12.834191,5.54
109,1977,1,7.787,12.85066,8.13
110,1977,2,7.293,12.854411,8.63
111,1977,3,7.123,12.860801,7.87
112,1977,4,7.207,12.87915,7.01
113,1978,1,7.333,12.888765,7.17
114,1978,2,8.183,12.903222,5.58
115,1978,3,8.74,12.909992,8.33
116,1978,4,10.08,12.921891,9.15
117,1979,1,10.83,12.933438,7.48
118,1979,2,10.833,12.939123,8.65
119,1979,3,11.267,12.949133,8.03
120,1979,4,13.367,12.954257,8.8
121,1980,1,13.817,12.956979,9.58
122,1980,2,13.01,12.955487,10.12
123,1980,3,10.313,12.950958,10.35
124,1980,4,13.583,12.971475,11.32
125,1981,1,16.76,12.991562,11.95
126,1981,2,18.12,13.00421,8.74
127,1981,3,19.94,12.995257,11.45
128,1981,4,16.29,12.988174,9.24
129,1982,1,14.633,12.976607,9.72
130,1982,2,15.42,12.964268,10.28
131,1982,3,14.42,12.957715,9.29
132,1982,4,10.837,12.949713,8.11
133,1983,1,9.38,12.966551,3.27
134,1983,2,9.193,12.988805,5.23
135,1983,3,9.283,13.004741,5.26
136,1983,4,9.437,13.012388,5.22
137,1984,1,9.943,13.028747,3.7
138,1984,2,11.19,13.051537,2.12
139,1984,3,12.367,13.062749,2.7
140,1984,4,10.89,13.074173,4
141,1985,1,10.39,13.086662,4.68
142,1985,2,9.61,13.090096,3.3
143,1985,3,9.033,13.102291,3.19
144,1985,4,8.797,13.124553,3.47
145,1986,1,10.69,13.130252,5.25
146,1986,2,8.69,13.132456,2.38
147,1986,3,8.313,13.137654,3.24
148,1986,4,8.27,13.13415,4.97
149,1987,1,7.343,13.154164,4.36
150,1987,2,7.96,13.163267,3.71
151,1987,3,8.9,13.183285,2.8
152,1987,4,8.473,13.196506,4.25
153,1988,1,8.39,13.209201,2.68
154,1988,2,8.947,13.22307,4.45
155,1988,3,9.717,13.226298,4.16
156,1988,4,10.61,13.233425,4.97
157,1989,1,11.523,13.243986,3.04
158,1989,2,12.187,13.245388,7.06
159,1989,3,12.14,13.248968,5.28
160,1989,4,12.213,13.250475,2.57
161,1990,1,12.73,13.253932,4.13
162,1990,2,13.54,13.249588,3.69
163,1990,3,12.907,13.244546,4.77
164,1990,4,12.043,13.231211,5.35
165,1991,1,10.157,13.218808,9.54
166,1991,2,9.001,13.22699,1.65
167,1991,3,8.562,13.22989,2.41
168,1991,4,7.601,13.231533,-2
169,1992,1,7.218,13.231957,1.78
170,1992,2,6.304,13.234377,1.95
171,1992,3,5.251,13.235035,2.29
172,1992,4,7.262,13.236427,2.34
173,1993,1,6.051,13.246116,0.83
174,1993,2,4.98,13.254016,1.98
175,1993,3,4.468,13.258019,1.46
176,1993,4,4.208,13.267364,1.9
177,1994,1,3.946,13.277958,-1.45
178,1994,2,6.154,13.288935,0.52
179,1994,3,5.666,13.302823,1.48
180,1994,4,5.901,13.315091,1.69
181,1995,1,7.884,13.319127,1.37
182,1995,2,7.454,13.31662,2.51
183,1995,3,6.54,13.319567,1.69
184,1995,4,6.049,13.321889,0.05
185,1996,1,5.215,13.325324,0.46
186,1996,2,4.777,13.328877,2.22
187,1996,3,4.216,13.337101,1.4
188,1996,4,3.028,13.344239,1.81