Year	Percent
1950	12.94358
1955	13.21459
1960	11.02991
1965	9.05601
1970	8.65819
1975	8.62526
1980	9.70511
1985	10.41301
1990	11.6209
1995	13.49275
2000	15.99999
2005	16.55839
2010	18.41839
2015	25.63548
2020	28.28894
2025	30.54509
2030	29.41308
2035	27.15713
2040	26.38265
2045	24.9558
2050	24.74525
2055	25.63384
2060	25.89404
2065	26.14969
2070	25.81715
2075	25.11679
2080	24.45923
2085	24.37683
2090	24.52813
2095	24.56512
2100	24.38979