Year	Percent
1950	9.92521
1955	10.21858
1960	9.9462
1965	9.21499
1970	10.13067
1975	10.48568
1980	10.62764
1985	10.1552
1990	9.68026
1995	10.35055
2000	11.48292
2005	11.15328
2010	10.6427
2015	10.24801
2020	9.75705
2025	9.46447
2030	9.00444
2035	8.65996
2040	8.26309
2045	7.87466
2050	7.51903
2055	7.19437
2060	6.91953
2065	6.65127
2070	6.42
2075	6.2046
2080	6.02954
2085	5.88234
2090	5.7559
2095	5.64308
2100	5.54553