Year	Percent
1950	10.93178
1955	10.7072
1960	9.82438
1965	9.26824
1970	11.3652
1975	11.27652
1980	10.75934
1985	10.54567
1990	10.90752
1995	11.70535
2000	12.27802
2005	11.46018
2010	10.65187
2015	9.72154
2020	8.92793
2025	8.81232
2030	9.09152
2035	8.60715
2040	8.03085
2045	7.50048
2050	7.12538
2055	6.88897
2060	6.71261
2065	6.51783
2070	6.29226
2075	6.07489
2080	5.89741
2085	5.77892
2090	5.69961
2095	5.63334
2100	5.55362