Year	Percent
1950	27.48655
1955	27.21597
1960	26.8747
1965	26.41811
1970	26.09103
1975	25.8932
1980	25.88552
1985	26.29592
1990	27.06447
1995	27.89127
2000	28.17527
2005	28.44367
2010	27.37618
2015	28.08777
2020	29.26624
2025	30.59007
2030	31.58272
2035	31.83478
2040	31.67688
2045	31.40555
2050	31.24069
2055	31.18548
2060	31.1012
2065	30.89149
2070	30.55879
2075	30.19257
2080	29.88037
2085	29.64574
2090	29.42815
2095	29.1688
2100	28.83585