Year	Percent
1950	13.83624
1955	15.29122
1960	13.60433
1965	12.46857
1970	11.99425
1975	10.62319
1980	9.90416
1985	9.62297
1990	8.85845
1995	8.1373
2000	6.8402
2005	6.17635
2010	5.58555
2015	5.72461
2020	5.67895
2025	5.47634
2030	5.15905
2035	4.86467
2040	4.72855
2045	4.75554
2050	4.8415
2055	4.86739
2060	4.79215
2065	4.68535
2070	4.62949
2075	4.66012
2080	4.73999
2085	4.78979
2090	4.78448
2095	4.72611
2100	4.66912