Year	Percent
1950	14.40081
1955	12.69527
1960	11.17759
1965	10.05575
1970	10.32746
1975	9.98386
1980	11.87584
1985	12.96588
1990	12.22848
1995	13.3392
2000	14.16069
2005	15.74665
2010	17.9868
2015	19.72634
2020	21.61995
2025	23.52511
2030	25.23274
2035	26.3146
2040	26.5458
2045	26.46039
2050	26.07827
2055	26.1258
2060	26.37265
2065	26.58637
2070	26.66032
2075	26.25477
2080	25.83285
2085	25.44301
2090	25.14134
2095	24.91462
2100	24.69359