Year	Percent
1950	12.79947
1955	13.30507
1960	13.65603
1965	14.08151
1970	14.59557
1975	15.48209
1980	15.91817
1985	14.6174
1990	12.57039
1995	11.2751
2000	11.99783
2005	13.88927
2010	16.44587
2015	18.67338
2020	20.4424
2025	24.95798
2030	31.08862
2035	35.10679
2040	35.47054
2045	31.79133
2050	26.82124
2055	24.35835
2060	24.44329
2065	25.19859
2070	24.99114
2075	23.55266
2080	22.3274
2085	22.09033
2090	22.66728
2095	23.23584
2100	23.16286