Year	Percent
1950	19.17818
1955	17.28307
1960	18.07815
1965	18.38953
1970	18.31298
1975	18.0001
1980	17.97016
1985	18.19044
1990	17.90644
1995	16.90443
2000	15.51948
2005	15.96574
2010	16.62805
2015	15.65702
2020	14.426
2025	13.45264
2030	12.7889
2035	12.29418
2040	11.7239
2045	11.01425
2050	10.27225
2055	9.6347
2060	9.13159
2065	8.70976
2070	8.29719
2075	7.84995
2080	7.42234
2085	7.04859
2090	6.72885
2095	6.46336
2100	6.22653