Year	Percent
1950	9.52911
1955	7.75983
1960	9.63566
1965	9.75582
1970	8.9092
1975	8.03741
1980	7.22907
1985	7.44896
1990	7.26704
1995	7.35395
2000	6.80578
2005	5.84229
2010	5.96322
2015	5.17812
2020	5.60161
2025	5.37956
2030	5.04244
2035	4.81452
2040	4.71509
2045	4.67774
2050	4.73071
2055	4.80401
2060	4.78265
2065	4.69355
2070	4.64182
2075	4.65806
2080	4.72068
2085	4.7936
2090	4.83036
2095	4.81031
2100	4.77049