Year	Percent
1950	12.02542
1955	12.24375
1960	12.38714
1965	12.70148
1970	13.00929
1975	14.02986
1980	15.04474
1985	16.08375
1990	17.0404
1995	18.61559
2000	20.75735
2005	23.09485
2010	23.94792
2015	24.2256
2020	23.55242
2025	22.34169
2030	22.12031
2035	22.58443
2040	23.69058
2045	24.78784
2050	24.86461
2055	24.39302
2060	23.96989
2065	23.61204
2070	23.62072
2075	23.57993
2080	23.31084
2085	22.8159
2090	22.30497
2095	21.94705
2100	21.7595