year	quarter	y	x1	x2
1952	3	112.7	105761	96.21
1952	4	115.0	121874	93.74
1953	1	121.4	126260	91.37
1953	2	118.4	145248	86.31
1953	3	122.7	160370	84.98
1953	4	128.8	163648	86.46
1954	1	135.7	178195	90.04
1954	2	148.5	187197	94.74
1954	3	165.4	195916	92.43
1954	4	178.5	199253	92.41
1955	1	187.3	227616	91.65
1955	2	195.9	215363	89.38
1955	3	205.2	231728	91.05
1955	4	191.5	231767	89.89
1956	1	183.0	211211	90.16
1956	2	184.5	185200	86.78
1956	3	181.1	152404	88.45
1956	4	173.7	156163	90.69
1957	1	185.4	151567	86.03
1957	2	201.8	213683	84.85
1957	3	198.0	244543	84.07
1957	4	168.0	253111	81.96
1958	1	161.6	266580	80.03
1958	2	170.2	253543	79.80
1958	3	184.5	261675	80.19
1958	4	211.0	249407	80.13
1959	1	218.3	246248	80.42
1959	2	231.7	293062	82.67
1959	3	247.4	285809	82.78
1959	4	301.9	366265	82.61
1960	1	323.8	374241	82.47
1960	2	314.1	375764	81.86
1960	3	321.0	354411	79.70
1960	4	312.9	249527	77.89
1961	1	323.7	206165	77.61
1961	2	349.3	258410	78.90
1961	3	310.4	279342	79.72
1961	4	295.8	264824	78.08
1962	1	301.2	312983	77.54
1962	2	285.8	300932	76.99
1962	3	271.7	323424	76.25
1962	4	283.6	312780	78.13
1963	1	295.7	363336	80.38
1963	2	309.3	378275	81.78
1963	3	295.7	414457	82.81
1963	4	342.0	459158	84.99
1964	1	335.1	460397	86.31
1964	2	344.4	462279	85.95
1964	3	360.9	434255	90.73
1964	4	346.5	475890	92.42
1965	1	340.6	439365	87.18
1965	2	340.3	431666	85.20
1965	3	323.3	399160	85.44
1965	4	345.6	449564	87.85
1966	1	349.3	437555	89.95
1966	2	359.7	426616	90.20
1966	3	320.0	399254	88.89
1966	4	299.9	334587	83.25
1967	1	318.5	367997	81.21
1967	2	343.1	393808	79.90
1967	3	360.8	375968	78.70
1967	4	397.8	381692	81.50