Year	Percent
1950	10.6841
1955	11.54795
1960	11.33859
1965	12.39322
1970	12.20739
1975	12.09862
1980	12.04399
1985	12.09349
1990	12.31184
1995	12.16946
2000	11.71732
2005	11.37902
2010	11.10944
2015	10.57348
2020	9.93463
2025	9.31094
2030	9.00574
2035	8.66179
2040	8.2869
2045	7.89014
2050	7.51225
2055	7.16487
2060	6.8601
2065	6.58424
2070	6.3364
2075	6.10615
2080	5.90135
2085	5.7186
2090	5.5663
2095	5.43406
2100	5.31711