Year	Percent
1950	14.83378
1955	14.62589
1960	14.53676
1965	14.56182
1970	14.50116
1975	14.27978
1980	13.94599
1985	13.74882
1990	13.53437
1995	13.27791
2000	13.08953
2005	12.88788
2010	12.78897
2015	13.01488
2020	13.46036
2025	13.95947
2030	14.3538
2035	14.63303
2040	15.02047
2045	15.72259
2050	16.72576
2055	17.91458
2060	19.00503
2065	19.91038
2070	20.70184
2075	21.41933
2080	22.14103
2085	22.81489
2090	23.3806
2095	23.83102
2100	24.1687