Year	Percent
1950	6.69669
1955	5.94078
1960	5.21383
1965	4.84612
1970	4.52968
1975	4.37755
1980	4.39398
1985	4.61082
1990	5.22484
1995	5.58719
2000	5.94846
2005	6.17094
2010	6.3557
2015	6.9102
2020	7.67702
2025	9.21847
2030	11.81182
2035	15.16165
2040	18.81792
2045	22.00582
2050	24.63627
2055	26.33773
2060	27.48033
2065	28.53061
2070	29.87219
2075	31.51682
2080	32.77155
2085	33.64225
2090	34.16793
2095	34.50866
2100	34.85656