Year	Percent
1950	9.31851
1955	8.5387
1960	8.10302
1965	8.57803
1970	9.08542
1975	9.74419
1980	9.40008
1985	9.42328
1990	12.27635
1995	12.37311
2000	13.4996
2005	12.30815
2010	11.89805
2015	12.91039
2020	14.20841
2025	16.32844
2030	17.50196
2035	18.69026
2040	19.6532
2045	20.74842
2050	22.90303
2055	24.04328
2060	23.60543
2065	23.14145
2070	24.26507
2075	26.53781
2080	28.11198
2085	29.13263
2090	29.85641
2095	30.60954
2100	31.51504