Year	Percent
1950	8.99652
1955	7.95176
1960	7.62448
1965	7.47995
1970	8.50177
1975	8.1638
1980	7.38271
1985	7.14127
1990	6.6841
1995	6.90748
2000	7.29482
2005	6.42563
2010	4.98725
2015	4.24155
2020	4.3939
2025	4.88675
2030	5.01696
2035	5.14659
2040	4.93036
2045	4.59846
2050	4.5497
2055	4.8019
2060	5.08318
2065	5.20731
2070	5.13365
2075	4.95799
2080	4.86548
2085	4.94127
2090	5.09245
2095	5.1715
2100	5.11406