Year	Percent
1950	6.90444
1955	6.39581
1960	5.96446
1965	5.67134
1970	5.3865
1975	5.26008
1980	5.14078
1985	5.14219
1990	5.9033
1995	6.26573
2000	6.79487
2005	7.5151
2010	8.14441
2015	9.31013
2020	10.64026
2025	12.05819
2030	13.61265
2035	15.23002
2040	16.85229
2045	18.57888
2050	20.48507
2055	22.40513
2060	24.25886
2065	25.90768
2070	27.57876
2075	29.20419
2080	30.70008
2085	32.03766
2090	33.23011
2095	34.29619
2100	35.21672