Year	Percent
1950	11.08658
1955	9.08395
1960	7.45587
1965	7.05403
1970	7.16045
1975	7.28195
1980	6.65763
1985	6.91914
1990	10.04289
1995	12.56158
2000	15.16119
2005	14.37678
2010	14.7879
2015	15.84014
2020	18.75319
2025	21.32597
2030	22.48352
2035	23.39738
2040	24.96719
2045	27.82229
2050	31.61051
2055	34.24455
2060	34.89272
2065	35.18935
2070	36.44497
2075	38.00284
2080	38.8737
2085	39.04437
2090	38.79646
2095	38.54554
2100	38.6012