Year	Percent
1950	11.44002
1955	12.65581
1960	13.69301
1965	14.33664
1970	12.54302
1975	12.08798
1980	9.97982
1985	8.44221
1990	8.42235
1995	8.7534
2000	8.16958
2005	6.06017
2010	6.029
2015	5.46333
2020	5.56524
2025	5.59649
2030	5.46369
2035	5.34452
2040	5.2234
2045	5.14837
2050	5.1458
2055	5.17531
2060	5.16854
2065	5.11113
2070	5.03586
2075	4.97661
2080	4.93209
2085	4.90481
2090	4.87154
2095	4.82996
2100	4.7804