Year	Percent
1950	9.62825
1955	10.41597
1960	11.59008
1965	10.58597
1970	9.42681
1975	8.40241
1980	9.15574
1985	9.7184
1990	8.86193
1995	8.06106
2000	7.08838
2005	5.60738
2010	5.09729
2015	5.47822
2020	5.50594
2025	5.42632
2030	5.22183
2035	4.89791
2040	4.64131
2045	4.64635
2050	4.82164
2055	4.9526
2060	4.96274
2065	4.8846
2070	4.79478
2075	4.78287
2080	4.86772
2085	4.9705
2090	5.01581
2095	4.96849
2100	4.88657