Year	Percent
1950	12.87394
1955	13.12879
1960	13.78815
1965	14.70216
1970	15.12111
1975	14.99669
1980	13.17713
1985	12.83052
1990	15.67761
1995	16.86173
2000	19.84216
2005	21.87506
2010	23.4456
2015	24.88439
2020	27.00678
2025	30.10465
2030	32.85447
2035	33.71966
2040	34.17976
2045	34.98372
2050	36.01021
2055	36.43631
2060	36.50136
2065	36.26849
2070	36.05402
2075	36.05648
2080	36.24664
2085	36.55264
2090	36.86102
2095	37.12273
2100	37.39212