Year	Percent
1950	9.99756
1955	10.15143
1960	11.46523
1965	12.94893
1970	14.1048
1975	15.15123
1980	13.08264
1985	13.88055
1990	15.92043
1995	16.2052
2000	16.3979
2005	17.32376
2010	17.9619
2015	20.7625
2020	22.40831
2025	22.86753
2030	24.05855
2035	26.4332
2040	29.17523
2045	30.26743
2050	31.29068
2055	32.73862
2060	33.0044
2065	33.08556
2070	33.35544
2075	33.45569
2080	33.67948
2085	33.96987
2090	34.29851
2095	34.56993
2100	34.8276