Year	Percent
1950	7.81522
1955	7.96944
1960	8.43948
1965	9.23494
1970	10.23168
1975	11.46548
1980	12.77624
1985	14.50318
1990	19.57053
1995	22.60673
2000	25.61383
2005	29.00867
2010	33.05384
2015	35.57246
2020	36.94566
2025	38.31129
2030	40.07848
2035	42.73924
2040	44.1599
2045	44.91952
2050	45.17046
2055	45.16209
2060	45.14796
2065	44.8303
2070	44.39118
2075	43.92677
2080	43.57777
2085	43.3545
2090	43.28922
2095	43.35802
2100	43.51612