Year	Percent
1950	5.8279
1955	5.75432
1960	6.1632
1965	7.036
1970	8.03817
1975	9.06322
1980	9.92204
1985	10.45336
1990	12.79119
1995	13.50731
2000	14.65738
2005	16.07909
2010	17.97872
2015	20.43978
2020	22.85978
2025	27.75234
2030	32.42445
2035	36.30129
2040	37.35787
2045	38.17939
2050	39.83459
2055	40.43696
2060	40.58377
2065	40.1181
2070	39.51531
2075	39.6202
2080	39.94251
2085	40.23352
2090	40.33745
2095	40.4149
2100	40.54819