Year	Percent
1950	3.59682
1955	3.87657
1960	4.05126
1965	4.09968
1970	4.12363
1975	4.14203
1980	4.00738
1985	4.18034
1990	4.5598
1995	4.83404
2000	5.10877
2005	5.56616
2010	6.14984
2015	6.60556
2020	7.33611
2025	8.32743
2030	9.40599
2035	10.64515
2040	12.31666
2045	13.90788
2050	16.26187
2055	18.31054
2060	20.15901
2065	21.73337
2070	22.88916
2075	23.98864
2080	25.04968
2085	26.14526
2090	27.22043
2095	28.16532
2100	28.94687