Year	Percent
1950	7.22419
1955	7.46178
1960	7.99043
1965	8.75749
1970	9.58072
1975	10.50996
1980	11.45329
1985	12.82477
1990	17.28111
1995	20.16184
2000	23.04078
2005	26.30513
2010	30.29218
2015	32.79314
2020	34.12381
2025	35.44689
2030	37.16366
2035	39.85544
2040	41.2845
2045	42.09578
2050	42.38141
2055	42.3435
2060	42.2653
2065	41.90374
2070	41.49647
2075	41.14226
2080	40.90573
2085	40.7716
2090	40.76472
2095	40.87281
2100	41.06664