Year	Percent
1950	6.93737
1955	6.55097
1960	5.83594
1965	4.96874
1970	4.50913
1975	4.19929
1980	4.23998
1985	4.60286
1990	4.7854
1995	4.64958
2000	4.91418
2005	5.25839
2010	5.42631
2015	5.52283
2020	6.04031
2025	7.15344
2030	8.72068
2035	10.48385
2040	12.10717
2045	13.83744
2050	15.35083
2055	16.75992
2060	18.19881
2065	19.67219
2070	21.39678
2075	23.35422
2080	25.13701
2085	26.77311
2090	28.27578
2095	29.70346
2100	31.07308