Year	Percent
1950	13.22867
1955	13.78301
1960	12.51587
1965	15.4602
1970	13.95367
1975	11.92609
1980	8.04958
1985	7.65053
1990	8.30405
1995	7.27367
2000	6.61322
2005	5.77034
2010	5.21559
2015	5.34501
2020	5.09317
2025	4.88617
2030	4.62497
2035	4.40884
2040	4.30692
2045	4.31856
2050	4.35826
2055	4.36227
2060	4.33643
2065	4.3229
2070	4.33673
2075	4.37742
2080	4.41506
2085	4.42888
2090	4.42074
2095	4.38967
2100	4.36492