Year	Percent
1950	14.22394
1955	15.71142
1960	16.20047
1965	15.91608
1970	15.71466
1975	16.98343
1980	18.47367
1985	20.0421
1990	23.32264
1995	25.36602
2000	27.84832
2005	31.24261
2010	32.93609
2015	32.49973
2020	30.49406
2025	26.7743
2030	23.62311
2035	23.0546
2040	23.54464
2045	24.79361
2050	26.50923
2055	25.54672
2060	24.23643
2065	23.44749
2070	23.21487
2075	23.91443
2080	24.24724
2085	23.99196
2090	23.32774
2095	22.78624
2100	22.65492