Year	Percent
1950	11.70508
1955	11.85551
1960	11.50016
1965	11.37673
1970	11.89705
1975	12.01827
1980	11.61761
1985	11.46727
1990	13.32909
1995	14.60381
2000	13.3082
2005	13.03357
2010	9.98536
2015	8.17382
2020	8.89485
2025	9.89145
2030	9.50306
2035	8.47155
2040	7.24959
2045	6.47844
2050	6.20349
2055	6.18977
2060	6.10236
2065	5.81273
2070	5.42405
2075	5.11718
2080	4.99572
2085	5.01277
2090	5.04629
2095	4.99352
2100	4.86142