Year	Percent
1950	9.49412
1955	7.5025
1960	9.99853
1965	10.5818
1970	8.64032
1975	8.05171
1980	7.94195
1985	8.19535
1990	8.38377
1995	8.05557
2000	7.67693
2005	7.04978
2010	6.37866
2015	6.22141
2020	5.80414
2025	5.68719
2030	5.67756
2035	5.62587
2040	5.51919
2045	5.40206
2050	5.30486
2055	5.23398
2060	5.21636
2065	5.21233
2070	5.17944
2075	5.1293
2080	5.0737
2085	5.03864
2090	5.02533
2095	5.01758
2100	4.99404