Year	Percent
1950	11.92968
1955	11.45111
1960	12.09384
1965	10.86322
1970	13.88202
1975	12.86585
1980	11.51525
1985	7.89713
1990	7.466
1995	8.27978
2000	7.366
2005	6.74194
2010	5.87772
2015	5.39471
2020	5.56164
2025	5.33269
2030	5.15375
2035	4.90928
2040	4.70105
2045	4.60635
2050	4.63214
2055	4.68875
2060	4.70123
2065	4.6689
2070	4.62753
2075	4.61024
2080	4.62866
2085	4.66539
2090	4.67932
2095	4.6602
2100	4.61889