Year	Percent
1950	4.68974
1955	5.78719
1960	6.53786
1965	7.95979
1970	9.46306
1975	11.63623
1980	11.18197
1985	10.06576
1990	11.05117
1995	11.71035
2000	13.04385
2005	13.49471
2010	15.55309
2015	18.06232
2020	20.97864
2025	23.65557
2030	25.48026
2035	26.95625
2040	27.64507
2045	28.15618
2050	28.28428
2055	28.49345
2060	28.76992
2065	29.40755
2070	30.07169
2075	30.75008
2080	31.38988
2085	31.96403
2090	32.44813
2095	32.87096
2100	33.2623