Year	Percent
1950	10.7257
1955	10.77809
1960	11.62446
1965	12.19704
1970	12.75702
1975	13.369
1980	13.70379
1985	13.88456
1990	14.75746
1995	16.04285
2000	17.69785
2005	21.64399
2010	21.62219
2015	21.87863
2020	22.10679
2025	22.68552
2030	23.19035
2035	23.93047
2040	23.76355
2045	23.44671
2050	24.28686
2055	24.99416
2060	25.70976
2065	25.98136
2070	25.5288
2075	25.12856
2080	24.98135
2085	24.94567
2090	24.8331
2095	24.56563
2100	24.22719