Year	Percent
1950	8.38278
1955	7.80768
1960	7.82746
1965	7.56961
1970	7.15453
1975	7.54078
1980	7.36302
1985	7.60807
1990	7.62451
1995	5.55727
2000	4.38042
2005	4.88416
2010	5.83063
2015	5.40393
2020	5.32448
2025	5.0251
2030	4.62185
2035	4.51787
2040	4.74329
2045	4.96575
2050	4.98442
2055	4.84262
2060	4.67367
2065	4.59705
2070	4.67468
2075	4.82901
2080	4.92592
2085	4.89395
2090	4.77628
2095	4.67563
2100	4.65008