Year	Percent
1950	6.02725
1955	7.57868
1960	9.04862
1965	8.05312
1970	7.6483
1975	9.2057
1980	11.96073
1985	10.73983
1990	11.06049
1995	11.05459
2000	10.48177
2005	10.23346
2010	11.07009
2015	14.30673
2020	18.59294
2025	23.77017
2030	27.79411
2035	31.32688
2040	32.97846
2045	36.25116
2050	39.72661
2055	40.83508
2060	40.27627
2065	38.68996
2070	37.53012
2075	37.28915
2080	37.62591
2085	37.79237
2090	37.74519
2095	37.71206
2100	37.9053