Year	Percent
1950	10.28803
1955	10.14826
1960	10.19453
1965	10.75668
1970	11.0077
1975	10.80302
1980	11.04991
1985	11.07089
1990	11.15654
1995	11.34626
2000	12.70663
2005	13.5139
2010	13.12409
2015	11.73001
2020	10.79436
2025	10.82258
2030	10.79232
2035	10.57245
2040	9.97506
2045	9.3586
2050	8.90225
2055	8.58714
2060	8.27843
2065	7.92395
2070	7.55429
2075	7.22378
2080	6.96164
2085	6.75515
2090	6.57014
2095	6.39667
2100	6.2238