Year	Percent
1950	14.52494
1955	15.81643
1960	15.56745
1965	15.02744
1970	14.21919
1975	12.56125
1980	11.38924
1985	11.16824
1990	11.13053
1995	10.08488
2000	8.90081
2005	7.9922
2010	7.51948
2015	6.93295
2020	6.5588
2025	6.21586
2030	5.88479
2035	5.57434
2040	5.32554
2045	5.15199
2050	5.0156
2055	4.9145
2060	4.82398
2065	4.7458
2070	4.6759
2075	4.63964
2080	4.61912
2085	4.61197
2090	4.6085
2095	4.59146
2100	4.57879