Year	Percent
1950	26.81798
1955	28.00728
1960	28.68899
1965	29.07143
1970	29.06774
1975	28.05726
1980	27.51578
1985	27.08315
1990	26.49465
1995	23.18729
2000	24.57371
2005	28.84371
2010	30.77974
2015	31.04218
2020	30.74898
2025	30.79158
2030	31.41876
2035	32.28953
2040	32.77969
2045	32.24957
2050	31.28346
2055	30.69915
2060	30.39794
2065	30.13854
2070	29.70654
2075	29.06087
2080	28.33066
2085	27.66375
2090	27.10441
2095	26.56672
2100	25.98041