Year	Percent
1950	5.94978
1955	6.1995
1960	6.29917
1965	6.31453
1970	6.32057
1975	6.30132
1980	6.40503
1985	6.6117
1990	7.78805
1995	8.35454
2000	9.10928
2005	10.30076
2010	11.59293
2015	13.49563
2020	15.67036
2025	18.07036
2030	20.53448
2035	22.65477
2040	24.4971
2045	26.50018
2050	28.81553
2055	30.83635
2060	32.3763
2065	33.53578
2070	34.56725
2075	35.31643
2080	35.9222
2085	36.4043
2090	36.80636
2095	37.15621
2100	37.47361