Year	Percent
1950	12.51171
1955	12.52778
1960	12.63605
1965	12.72372
1970	12.7056
1975	12.56208
1980	11.70144
1985	11.24258
1990	10.61139
1995	9.72427
2000	8.94363
2005	8.44788
2010	8.71628
2015	9.42783
2020	10.31182
2025	11.15279
2030	11.89972
2035	12.71331
2040	13.64387
2045	14.78411
2050	16.01919
2055	17.20412
2060	18.32726
2065	19.35541
2070	20.30839
2075	21.18745
2080	21.97087
2085	22.6381
2090	23.19698
2095	23.66996
2100	24.06797