Year	Percent
1950	8.92729
1955	7.91883
1960	7.04696
1965	6.71849
1970	6.45817
1975	6.05379
1980	5.33073
1985	5.14214
1990	6.18442
1995	6.16511
2000	6.55632
2005	6.06399
2010	6.07877
2015	6.81421
2020	8.10055
2025	9.47377
2030	10.67085
2035	11.73146
2040	12.89648
2045	14.12039
2050	15.89106
2055	17.49707
2060	17.88921
2065	18.28173
2070	18.90167
2075	20.85042
2080	22.50692
2085	23.67208
2090	24.44437
2095	25.16597
2100	26.09276