Year	Percent
1950	16.31493
1955	14.87304
1960	14.06826
1965	14.39219
1970	14.57676
1975	14.86709
1980	14.28217
1985	12.58439
1990	11.88644
1995	12.7629
2000	14.53947
2005	17.0405
2010	19.00934
2015	20.07055
2020	23.30075
2025	28.94247
2030	34.03509
2035	35.64801
2040	32.95252
2045	27.7765
2050	24.22936
2055	24.04212
2060	25.36235
2065	25.85514
2070	24.47503
2075	22.42479
2080	21.3377
2085	21.571
2090	22.45569
2095	22.974
2100	22.66271