Year	Percent
1950	3.18677
1955	3.65928
1960	4.04322
1965	4.50328
1970	4.91725
1975	5.28407
1980	5.50732
1985	5.60067
1990	5.73521
1995	5.4238
2000	5.11507
2005	4.87767
2010	4.66662
2015	4.58779
2020	4.6488
2025	4.81686
2030	5.08068
2035	5.40258
2040	5.86995
2045	6.42856
2050	7.02472
2055	7.70356
2060	8.5143
2065	9.49216
2070	10.65961
2075	11.90172
2080	13.17901
2085	14.48834
2090	15.84804
2095	17.2426
2100	18.65106