Year	Percent
1950	9.89296
1955	9.48302
1960	9.25755
1965	9.27005
1970	9.30039
1975	9.77539
1980	9.4542
1985	9.05565
1990	7.89793
1995	8.19836
2000	9.47335
2005	8.40102
2010	6.33335
2015	5.80089
2020	6.70545
2025	7.43747
2030	7.59667
2035	7.37544
2040	6.99085
2045	6.52636
2050	5.98843
2055	5.67818
2060	5.61002
2065	5.58472
2070	5.54756
2075	5.45161
2080	5.33889
2085	5.26444
2090	5.23457
2095	5.24153
2100	5.23737