Year	Percent
1950	8.42255
1955	7.64028
1960	8.45649
1965	9.74246
1970	10.97819
1975	10.89858
1980	9.68323
1985	10.32378
1990	13.31514
1995	15.0139
2000	16.46207
2005	16.68638
2010	18.62408
2015	21.27398
2020	22.54927
2025	23.28032
2030	23.91985
2035	24.96958
2040	26.34069
2045	27.55053
2050	29.28388
2055	30.66239
2060	31.62055
2065	32.47431
2070	32.93054
2075	33.34281
2080	33.82356
2085	34.33483
2090	34.80394
2095	35.21123
2100	35.58303