Year	Percent
1950	11.1086
1955	15.04434
1960	17.25674
1965	15.66217
1970	11.54469
1975	10.64846
1980	10.55194
1985	11.11856
1990	10.89876
1995	9.01486
2000	6.40327
2005	6.26004
2010	6.98857
2015	7.06721
2020	6.30055
2025	5.50493
2030	4.92364
2035	4.70785
2040	4.81291
2045	4.91779
2050	4.79412
2055	4.5178
2060	4.28584
2065	4.22886
2070	4.33546
2075	4.4792
2080	4.53678
2085	4.48209
2090	4.39346
2095	4.36262
2100	4.42801