Year	Percent
1950	16.1514
1955	15.05715
1960	14.42921
1965	14.73062
1970	14.83391
1975	14.93181
1980	14.21173
1985	12.48838
1990	11.86488
1995	12.74616
2000	14.48806
2005	17.15056
2010	19.33779
2015	20.71653
2020	23.70165
2025	28.61125
2030	32.95274
2035	34.32632
2040	32.15899
2045	27.79086
2050	24.70842
2055	24.59548
2060	25.78626
2065	26.19167
2070	24.83569
2075	22.75674
2080	21.60297
2085	21.80043
2090	22.6776
2095	23.20863
2100	22.9106