Year	Percent
1950	8.60295
1955	8.21569
1960	10.61507
1965	11.73727
1970	10.14921
1975	9.33359
1980	9.13563
1985	10.16971
1990	10.00412
1995	9.17719
2000	8.44159
2005	8.06485
2010	8.02003
2015	8.03956
2020	8.28498
2025	8.65638
2030	8.06775
2035	7.61631
2040	7.34918
2045	7.26015
2050	7.22698
2055	7.14387
2060	6.92591
2065	6.63364
2070	6.34758
2075	6.13882
2080	6.00368
2085	5.87958
2090	5.73786
2095	5.56024
2100	5.37805