Year	Percent
1950	6.08389
1955	6.21491
1960	6.30242
1965	6.60282
1970	6.47882
1975	5.96737
1980	6.08825
1985	6.13055
1990	6.77642
1995	7.03012
2000	7.0861
2005	6.91988
2010	6.98783
2015	8.31448
2020	10.44287
2025	12.83546
2030	15.27386
2035	17.78168
2040	20.21017
2045	22.7828
2050	25.49309
2055	27.95729
2060	28.72948
2065	29.07177
2070	29.85639
2075	30.98407
2080	31.92247
2085	32.72023
2090	33.08003
2095	33.19023
2100	33.35856