Year	Percent
1950	14.16981
1955	14.55472
1960	15.0184
1965	15.74674
1970	16.54166
1975	17.28052
1980	17.31426
1985	17.61867
1990	20.8701
1995	20.73756
2000	20.80626
2005	21.23106
2010	22.65864
2015	23.51493
2020	24.76878
2025	26.60829
2030	28.28637
2035	29.22764
2040	29.88631
2045	30.68207
2050	31.49005
2055	32.01581
2060	32.18203
2065	32.15941
2070	32.67579
2075	33.33358
2080	33.96931
2085	34.52863
2090	34.97887
2095	35.4206
2100	35.9539