Year	Percent
1950	10.3973
1955	11.70535
1960	12.63592
1965	12.45782
1970	12.48582
1975	13.8752
1980	14.58307
1985	12.19173
1990	11.9772
1995	13.2686
2000	13.26625
2005	14.02972
2010	15.15157
2015	16.54104
2020	16.40318
2025	16.46956
2030	15.8659
2035	16.41747
2040	18.10469
2045	20.42628
2050	22.97565
2055	23.61437
2060	23.12932
2065	22.25283
2070	21.86233
2075	22.41123
2080	23.51247
2085	24.25478
2090	24.28096
2095	23.83643
2100	23.45006