Year	Percent
1950	10.23427
1955	11.32149
1960	12.12098
1965	12.66833
1970	13.49767
1975	13.91867
1980	10.75077
1985	10.12727
1990	10.42188
1995	11.84684
2000	10.26117
2005	7.97897
2010	6.59905
2015	6.62514
2020	6.96436
2025	6.88945
2030	6.26051
2035	5.69239
2040	5.39119
2045	5.39616
2050	5.53785
2055	5.58687
2060	5.46695
2065	5.28452
2070	5.1842
2075	5.20799
2080	5.30229
2085	5.35932
2090	5.32714
2095	5.23766
2100	5.16683