Year	Percent
1950	3.3193
1955	3.58534
1960	3.75795
1965	3.80122
1970	3.82064
1975	3.83883
1980	3.66475
1985	3.84904
1990	4.19107
1995	4.48073
2000	4.77003
2005	5.21185
2010	5.77398
2015	6.16769
2020	6.9299
2025	8.00003
2030	9.06914
2035	10.22598
2040	11.80661
2045	13.30457
2050	15.55626
2055	17.49387
2060	19.2236
2065	20.67634
2070	21.70279
2075	22.6689
2080	23.59712
2085	24.53845
2090	25.45845
2095	26.25729
2100	26.902