Year	Percent
1950	14.90187
1955	15.24001
1960	14.1834
1965	13.92067
1970	14.23346
1975	14.30967
1980	14.21771
1985	12.93252
1990	13.06817
1995	13.07952
2000	14.31964
2005	17.05103
2010	18.03933
2015	18.69542
2020	19.50789
2025	21.01087
2030	25.45553
2035	28.09051
2040	28.66208
2045	26.96609
2050	24.57501
2055	24.12638
2060	24.65914
2065	25.41355
2070	24.85739
2075	23.47708
2080	22.2358
2085	21.8192
2090	22.08711
2095	22.3404
2100	22.03581