Year	Percent
1950	10.98352
1955	11.6756
1960	12.47789
1965	13.30629
1970	14.52273
1975	15.54925
1980	14.98085
1985	16.15596
1990	20.53142
1995	22.27534
2000	24.19216
2005	25.08996
2010	26.85917
2015	28.59452
2020	30.69895
2025	33.60261
2030	36.55915
2035	39.10423
2040	40.36671
2045	40.57388
2050	40.28962
2055	39.8124
2060	39.20919
2065	38.81022
2070	38.73418
2075	38.56806
2080	38.50598
2085	38.55185
2090	38.72033
2095	39.00403
2100	39.34795