Year	Percent
1950	9.59774
1955	9.4311
1960	9.51314
1965	8.9072
1970	9.16731
1975	9.10829
1980	9.77283
1985	11.01381
1990	11.77016
1995	11.8957
2000	11.52208
2005	11.06649
2010	9.69108
2015	8.60293
2020	8.32542
2025	8.43157
2030	8.49754
2035	7.70335
2040	6.97796
2045	6.37769
2050	6.05529
2055	6.00076
2060	6.04315
2065	5.98714
2070	5.79197
2075	5.55307
2080	5.39552
2085	5.3495
2090	5.37267
2095	5.38655
2100	5.34332