Year	Percent
1950	14.48144
1955	14.22802
1960	13.4537
1965	13.2314
1970	13.17883
1975	12.87847
1980	12.68953
1985	12.7481
1990	12.9806
1995	14.04241
2000	15.54194
2005	17.24933
2010	19.30572
2015	21.64934
2020	23.39086
2025	24.59993
2030	25.44622
2035	25.61574
2040	26.05564
2045	26.3273
2050	26.2359
2055	26.02421
2060	25.56123
2065	25.16562
2070	24.75598
2075	24.12121
2080	23.48518
2085	22.96144
2090	22.58623
2095	22.32118
2100	22.09991