Year	Y	P
1947	250.0	12.886
1948	274.8	13.603
1949	272.9	13.581
1950	300.2	13.738
1951	347.3	14.715
1952	367.7	14.971
1953	389.8	15.157
1954	391.1	15.298
1955	426.2	15.558
1956	450.2	16.090
1957	474.9	16.625
1958	482.1	17.000
1959	522.5	17.237
1960	543.3	17.477
1961	563.3	17.668
1962	605.1	17.886
1963	638.6	18.087
1964	685.8	18.365
1965	743.7	18.700
1966	815.1	19.226
1967	861.7	19.785
1968	942.5	20.625
1969	1019.9	21.642
1970	1075.9	22.785
1971	1167.8	23.940
1972	1282.4	24.973
1973	1428.6	26.335
1974	1548.8	28.708
1975	1688.9	31.353
1976	1877.6	33.079
1977	2086.0	35.127
1978	2356.6	37.585
1979	2632.2	40.702
1980	2862.5	44.378
1981	3211.0	48.522
1982	3345.0	51.530
1983	3638.1	53.554
1984	4040.7	55.459
1985	4346.8	57.236
1986	4590.1	58.393
1987	4870.2	59.879
1988	5252.6	61.974
1989	5657.7	64.388
1990	5979.6	66.774
1991	6174.1	68.993
1992	6539.3	70.564
1993	6878.7	72.244
1994	7308.8	73.781
1995	7664.1	75.321
1996	8100.2	76.695
1997	8608.5	78.009
1998	9089.2	78.855
1999	9660.6	80.061
2000	10284.8	81.883
2001	10621.8	83.753
2002	10977.5	85.038
2003	11510.7	86.729
2004	12274.9	89.114
2005	13093.7	91.981
2006	13855.9	94.812
2007	14477.6	97.334
2008	14718.6	99.250
2009	14418.7	100.000
2010	14964.4	101.217
2011	15517.9	103.307
2012	16155.3	105.213
2013	16663.2	106.926
2014	17348.1	108.682