Year	Percent
1950	11.20771
1955	10.85142
1960	11.97035
1965	12.16863
1970	16.58493
1975	15.18319
1980	12.83746
1985	11.4563
1990	9.98462
1995	11.99203
2000	13.06421
2005	11.00359
2010	9.44063
2015	8.14379
2020	8.38471
2025	8.51449
2030	8.168
2035	7.31602
2040	6.43886
2045	5.95527
2050	5.87556
2055	5.84536
2060	5.64435
2065	5.29582
2070	4.94858
2075	4.78022
2080	4.79858
2085	4.86633
2090	4.846
2095	4.71907
2100	4.56363