Year	Percent
1950	8.34795
1955	8.13288
1960	9.4462
1965	9.01798
1970	7.89945
1975	8.16237
1980	11.23335
1985	10.0304
1990	9.59463
1995	7.5974
2000	8.02781
2005	7.16744
2010	7.12772
2015	6.60621
2020	6.46207
2025	6.79026
2030	6.52159
2035	6.1259
2040	5.89988
2045	5.8684
2050	5.8541
2055	5.72607
2060	5.52709
2065	5.2747
2070	5.09145
2075	4.95799
2080	4.84523
2085	4.71721
2090	4.58617
2095	4.46574
2100	4.38065