Year	Percent
1950	10.03217
1955	10.50041
1960	11.01344
1965	11.30386
1970	9.70909
1975	9.84183
1980	10.04598
1985	10.26196
1990	10.3557
1995	10.46328
2000	10.4278
2005	11.2927
2010	11.24563
2015	11.1555
2020	11.05929
2025	11.24539
2030	10.49763
2035	10.36948
2040	10.16642
2045	9.8893
2050	9.53923
2055	9.19303
2060	8.86607
2065	8.54767
2070	8.25778
2075	7.97538
2080	7.70361
2085	7.43614
2090	7.17345
2095	6.92369
2100	6.68634