Year	Percent
1950	18.04017
1955	17.33817
1960	16.62652
1965	16.04515
1970	15.748
1975	15.84951
1980	16.10939
1985	16.92316
1990	17.72564
1995	19.49788
2000	21.64634
2005	23.63525
2010	25.42932
2015	26.03053
2020	26.02157
2025	26.03354
2030	26.37586
2035	26.84177
2040	27.07314
2045	26.69027
2050	25.80042
2055	24.88868
2060	24.30417
2065	23.96493
2070	23.59634
2075	23.31874
2080	23.02315
2085	22.75561
2090	22.53541
2095	22.38335
2100	22.2645