Year	Percent
1950	7.6074
1955	8.15024
1960	8.99242
1965	10.05973
1970	10.91322
1975	12.43202
1980	12.37301
1985	11.43855
1990	13.4568
1995	13.94782
2000	15.09003
2005	15.45862
2010	17.33919
2015	19.82218
2020	22.87216
2025	25.75931
2030	27.71456
2035	29.35755
2040	30.13774
2045	30.79433
2050	30.9807
2055	31.20068
2060	31.36162
2065	31.77108
2070	32.21439
2075	32.70797
2080	33.18841
2085	33.63393
2090	34.03579
2095	34.40435
2100	34.76439