Year	Percent
1950	6.85194
1955	6.46957
1960	5.75448
1965	5.37076
1970	5.17043
1975	5.1345
1980	3.84225
1985	3.96549
1990	4.01182
1995	4.20301
2000	3.88158
2005	4.81518
2010	5.37562
2015	7.08599
2020	9.58002
2025	12.46749
2030	15.80853
2035	19.27736
2040	22.68196
2045	25.98133
2050	28.73177
2055	30.48883
2060	32.07691
2065	33.1792
2070	33.7099
2075	34.54291
2080	35.31638
2085	35.95642
2090	36.46072
2095	36.85624
2100	37.18846