Year	Percent
1950	4.97275
1955	4.89831
1960	4.96635
1965	5.13658
1970	5.25913
1975	5.33453
1980	5.50948
1985	5.60851
1990	6.19144
1995	6.38907
2000	6.3102
2005	6.32818
2010	6.7966
2015	7.97329
2020	9.20953
2025	10.43133
2030	11.76844
2035	13.1289
2040	14.46114
2045	15.7147
2050	16.77171
2055	17.90427
2060	19.2344
2065	20.84124
2070	21.82943
2075	22.25658
2080	22.59845
2085	22.99707
2090	23.48985
2095	24.00422
2100	24.48182