Year	Percent
1950	13.59532
1955	13.3636
1960	14.37886
1965	14.70617
1970	14.90926
1975	14.55313
1980	14.31173
1985	14.01442
1990	12.84117
1995	11.99774
2000	11.97389
2005	11.34543
2010	9.55128
2015	8.62987
2020	8.05783
2025	7.78471
2030	7.30314
2035	6.73147
2040	6.17764
2045	5.72327
2050	5.40989
2055	5.19587
2060	4.99787
2065	4.78924
2070	4.58272
2075	4.42565
2080	4.32598
2085	4.27873
2090	4.25219
2095	4.22844
2100	4.1917