Year	Percent
1950	5.3404
1955	5.16346
1960	5.07199
1965	4.77749
1970	6.4747
1975	6.67981
1980	7.24537
1985	7.95677
1990	9.83192
1995	11.02599
2000	13.18984
2005	15.55882
2010	17.39272
2015	20.25038
2020	22.41971
2025	24.70275
2030	25.86617
2035	26.39975
2040	25.78414
2045	25.39694
2050	25.35434
2055	26.33566
2060	27.68674
2065	29.01654
2070	29.99067
2075	31.18866
2080	32.35031
2085	33.2818
2090	33.98162
2095	34.50839
2100	34.95927