Year	Percent
1950	11.12974
1955	11.59423
1960	11.67607
1965	11.28769
1970	11.418
1975	11.77604
1980	12.10232
1985	12.06812
1990	11.40639
1995	12.39602
2000	13.85321
2005	15.81946
2010	17.45843
2015	18.25286
2020	18.04784
2025	17.31568
2030	16.04907
2035	16.08668
2040	17.1195
2045	18.64156
2050	21.37228
2055	22.6429
2060	22.81682
2065	22.69459
2070	21.83155
2075	21.8838
2080	22.71317
2085	23.51027
2090	23.7799
2095	23.41801
2100	22.89108