Year	Percent
1950	11.00366
1955	10.3613
1960	11.82459
1965	13.69299
1970	14.40159
1975	13.19906
1980	14.28451
1985	13.3962
1990	12.01422
1995	11.80336
2000	10.61458
2005	12.90479
2010	11.98352
2015	10.70611
2020	9.28481
2025	9.10612
2030	8.91034
2035	8.54247
2040	8.10361
2045	7.67751
2050	7.31998
2055	7.05208
2060	6.82067
2065	6.59952
2070	6.3844
2075	6.21129
2080	6.07629
2085	5.97016
2090	5.88142
2095	5.7938
2100	5.70305