Year	Percent
1950	10.52568
1955	10.7297
1960	10.87386
1965	10.81088
1970	10.35932
1975	10.75181
1980	11.03448
1985	10.33892
1990	10.03461
1995	10.46533
2000	11.11064
2005	10.84166
2010	9.17896
2015	10.01664
2020	9.3086
2025	9.99614
2030	9.35003
2035	9.07355
2040	8.73491
2045	8.44614
2050	8.21589
2055	8.0214
2060	7.81946
2065	7.60343
2070	7.36075
2075	7.13297
2080	6.91066
2085	6.70909
2090	6.50155
2095	6.30486
2100	6.12282