Year	Percent
1950	9.06034
1955	9.80017
1960	9.15773
1965	8.86995
1970	9.93033
1975	10.98157
1980	11.29046
1985	10.33114
1990	9.71418
1995	9.28376
2000	9.46845
2005	10.26452
2010	9.21875
2015	8.46377
2020	6.37946
2025	5.06646
2030	5.47386
2035	5.39305
2040	5.43621
2045	5.3177
2050	4.9779
2055	4.63742
2060	4.54897
2065	4.6611
2070	4.75398
2075	4.74264
2080	4.6275
2085	4.49413
2090	4.44964
2095	4.51873
2100	4.61234