Year	Percent
1950	9.51555
1955	8.1834
1960	6.75676
1965	5.82045
1970	5.46054
1975	5.43719
1980	4.96821
1985	4.91487
1990	6.80642
1995	7.49281
2000	8.67598
2005	7.74262
2010	7.68088
2015	8.34894
2020	9.30333
2025	10.8528
2030	11.47644
2035	12.19482
2040	12.78595
2045	13.64136
2050	15.33745
2055	16.34103
2060	16.05076
2065	15.83155
2070	17.34579
2075	20.05238
2080	22.03835
2085	23.37538
2090	24.29148
2095	25.13977
2100	26.16151