1959	2212.3	177.830
1960	2261.7	180.671
1961	2309.1	183.691
1962	2449.1	186.538
1963	2554.0	189.242
1964	2702.9	191.889
1965	2874.8	194.303
1966	3060.2	196.560
1967	3140.2	198.712
1968	3288.6	200.706
1969	3388.0	202.677
1970	3388.2	205.052
1971	3500.1	207.661
1972	3690.3	209.896
1973	3902.3	211.909
1974	3888.2	213.854
1975	3865.1	215.973
1976	4081.1	218.035
1977	4279.3	220.239
1978	4493.7	222.585
1979	4624.0	225.055
1980	4611.9	227.726
1981	4724.9	229.966
1982	4623.6	232.188
1983	4810.0	234.307
1984	5138.2	236.348
1985	5329.5	238.466
1986	5489.9	240.651
1987	5648.4	242.804
1988	5862.9	245.021
1989	6060.4	247.342
1990	6138.7	249.913
1991	6079.0	252.650
1992	6244.4	255.419
1993	6383.8	258.137
1994	6604.2	260.660