Year	Percent
1950	9.15102
1955	10.33826
1960	9.23174
1965	10.37106
1970	11.36404
1975	12.25591
1980	12.89389
1985	12.46303
1990	11.29808
1995	11.0921
2000	10.56275
2005	9.80836
2010	9.63546
2015	8.93061
2020	8.0329
2025	7.80792
2030	7.22352
2035	6.81346
2040	6.39753
2045	6.02505
2050	5.7602
2055	5.5912
2060	5.44409
2065	5.28968
2070	5.13913
2075	4.99081
2080	4.89202
2085	4.82968
2090	4.78724
2095	4.73621
2100	4.67646