Year	Percent
1950	29.28827
1955	28.80358
1960	28.1735
1965	27.62563
1970	27.10573
1975	27.7672
1980	28.0076
1985	27.79649
1990	27.44373
1995	26.69854
2000	26.54745
2005	26.92637
2010	27.65993
2015	28.53639
2020	29.32461
2025	30.02277
2030	30.6094
2035	31.02274
2040	31.32494
2045	31.49572
2050	31.53504
2055	31.48451
2060	31.32601
2065	31.07772
2070	30.73128
2075	30.31638
2080	29.86801
2085	29.39094
2090	28.90301
2095	28.4086
2100	27.9008