Year	Percent
1950	10.0822
1955	7.88109
1960	6.97694
1965	7.5712
1970	8.01553
1975	8.86376
1980	8.50717
1985	6.01027
1990	5.38655
1995	5.87013
2000	6.05285
2005	5.39561
2010	5.12486
2015	4.71999
2020	4.47321
2025	4.55722
2030	4.73685
2035	4.82749
2040	4.72987
2045	4.56557
2050	4.47248
2055	4.50149
2060	4.63429
2065	4.76592
2070	4.81395
2075	4.7764
2080	4.71263
2085	4.67587
2090	4.6962
2095	4.73417
2100	4.75833