Year	Percent
1950	7.03789
1955	6.38939
1960	6.32744
1965	6.14527
1970	6.22743
1975	6.45292
1980	6.5233
1985	6.48882
1990	7.66025
1995	9.10763
2000	10.35011
2005	12.33977
2010	14.76439
2015	17.21713
2020	20.15778
2025	22.96347
2030	24.68284
2035	26.02739
2040	27.33615
2045	29.30192
2050	31.88882
2055	35.05659
2060	38.51081
2065	40.12589
2070	40.34369
2075	40.94178
2080	41.3745
2085	41.78789
2090	42.11009
2095	42.20137
2100	42.10693