Year	Percent
1950	10.1231
1955	10.3854
1960	7.65531
1965	8.73093
1970	8.40945
1975	8.58001
1980	7.79975
1985	7.59358
1990	7.622
1995	7.61722
2000	8.09337
2005	8.4305
2010	6.42357
2015	4.86355
2020	5.33371
2025	6.49999
2030	6.04267
2035	6.02078
2040	5.68867
2045	5.20594
2050	5.06634
2055	5.32365
2060	5.59936
2065	5.65093
2070	5.50708
2075	5.30966
2080	5.19429
2085	5.23657
2090	5.35681
2095	5.42085
2100	5.36493