Year	Percent
1950	13.70755
1955	14.46241
1960	15.05727
1965	15.6051
1970	16.1801
1975	13.81108
1980	13.19577
1985	11.19107
1990	11.66779
1995	10.32577
2000	10.6047
2005	8.7128
2010	7.16946
2015	7.32985
2020	7.20462
2025	6.90585
2030	6.57762
2035	6.19463
2040	5.81375
2045	5.57199
2050	5.52385
2055	5.53022
2060	5.46252
2065	5.33677
2070	5.20196
2075	5.10659
2080	5.07275
2085	5.07988
2090	5.08022
2095	5.04232
2100	4.98157