Year	Percent
1950	8.76148
1955	9.04306
1960	9.66757
1965	10.82027
1970	13.7173
1975	14.63123
1980	14.59185
1985	14.75709
1990	19.24958
1995	20.78305
2000	21.98842
2005	22.4866
2010	23.95123
2015	25.71652
2020	27.81153
2025	30.12686
2030	33.18562
2035	36.15185
2040	39.03045
2045	41.08826
2050	41.60417
2055	41.6483
2060	41.66289
2065	41.63792
2070	42.0778
2075	41.9839
2080	41.52072
2085	40.99524
2090	40.68346
2095	40.58659
2100	40.67534