Year	Percent
1950	10.8243
1955	10.28846
1960	9.57457
1965	9.22343
1970	11.15979
1975	11.13037
1980	11.2783
1985	11.07417
1990	11.2363
1995	11.77002
2000	12.16606
2005	11.80039
2010	10.15478
2015	7.65496
2020	6.78789
2025	8.31987
2030	9.56782
2035	8.61432
2040	7.57417
2045	6.68791
2050	6.2575
2055	6.26908
2060	6.4512
2065	6.48119
2070	6.18361
2075	5.75278
2080	5.46563
2085	5.38477
2090	5.42519
2095	5.45114
2100	5.38237