Year	Percent
1950	10.01963
1955	8.59948
1960	7.90063
1965	8.62353
1970	10.80489
1975	10.63685
1980	10.45049
1985	10.59055
1990	10.67703
1995	10.76947
2000	10.84233
2005	9.67135
2010	8.95645
2015	9.02575
2020	9.16824
2025	8.19914
2030	7.36626
2035	7.09208
2040	6.96743
2045	6.85316
2050	6.63879
2055	6.36345
2060	6.08174
2065	5.89175
2070	5.80846
2075	5.76839
2080	5.7164
2085	5.63522
2090	5.55071
2095	5.48543
2100	5.45723