Year	Percent
1950	7.57541
1955	7.94519
1960	8.78061
1965	10.06677
1970	11.08308
1975	11.72349
1980	10.45206
1985	11.14508
1990	13.78669
1995	15.35397
2000	16.65017
2005	16.82254
2010	18.26927
2015	20.49748
2020	22.27526
2025	22.49498
2030	24.95565
2035	27.21977
2040	29.49368
2045	30.36621
2050	32.25106
2055	32.62775
2060	32.76081
2065	32.87696
2070	33.32951
2075	33.55367
2080	33.7943
2085	34.0411
2090	34.26514
2095	34.53043
2100	34.85948