Year	Percent
1950	5.48545
1955	4.77343
1960	4.50809
1965	4.41416
1970	4.364
1975	4.40764
1980	4.65527
1985	5.13299
1990	6.15643
1995	6.91169
2000	7.80156
2005	8.62954
2010	9.34766
2015	10.17916
2020	10.94093
2025	11.81669
2030	12.78197
2035	13.92421
2040	15.18844
2045	16.467
2050	18.33122
2055	21.30542
2060	24.61892
2065	27.04726
2070	29.1572
2075	31.11049
2080	33.04586
2085	34.6832
2090	35.91912
2095	36.80443
2100	37.44461