Year	Percent
1950	27.36477
1955	28.82681
1960	27.10943
1965	25.36944
1970	24.95142
1975	24.53875
1980	25.38197
1985	25.50479
1990	25.30102
1995	25.54116
2000	26.45132
2005	28.4655
2010	29.35641
2015	29.79315
2020	28.91179
2025	28.0494
2030	26.78658
2035	26.15367
2040	25.97098
2045	25.19253
2050	24.59795
2055	24.22332
2060	24.05329
2065	24.0977
2070	24.25459
2075	24.2605
2080	23.99642
2085	23.68014
2090	23.42479
2095	23.25339
2100	23.1373