Year	Percent
1950	6.9521
1955	6.53084
1960	5.81624
1965	5.18164
1970	4.63833
1975	4.22985
1980	4.04115
1985	4.1197
1990	4.54727
1995	4.5891
2000	4.46307
2005	4.82952
2010	4.91029
2015	5.84686
2020	6.81674
2025	7.51068
2030	8.47777
2035	9.5617
2040	11.10359
2045	12.94825
2050	14.63052
2055	16.15879
2060	18.4116
2065	20.95713
2070	23.50755
2075	25.73913
2080	27.39279
2085	28.82103
2090	30.10989
2095	31.32967
2100	32.47123