Year	Percent
1950	10.12956
1955	11.12316
1960	10.00913
1965	7.61459
1970	9.87147
1975	9.32411
1980	9.06637
1985	7.76952
1990	7.6011
1995	5.51494
2000	5.06182
2005	4.97874
2010	5.2025
2015	4.88639
2020	4.77089
2025	4.65847
2030	4.55518
2035	4.53061
2040	4.57987
2045	4.59679
2050	4.56949
2055	4.54724
2060	4.54536
2065	4.57907
2070	4.63215
2075	4.67751
2080	4.68745
2085	4.67409
2090	4.65213
2095	4.64455
2100	4.64748