Year	Percent
1950	9.05693
1955	8.13468
1960	8.87173
1965	9.49682
1970	9.32952
1975	8.1794
1980	7.87919
1985	7.35429
1990	7.59936
1995	7.67192
2000	6.91512
2005	5.32248
2010	4.5023
2015	4.73481
2020	5.27973
2025	5.39639
2030	5.50249
2035	5.24896
2040	4.88006
2045	4.80787
2050	5.04778
2055	5.31316
2060	5.41472
2065	5.3171
2070	5.12275
2075	5.0189
2080	5.08987
2085	5.2399
2090	5.3191
2095	5.25806
2100	5.12242