Year	Percent
1950	9.53592
1955	9.4357
1960	9.26378
1965	9.1458
1970	10.22698
1975	10.04095
1980	9.78362
1985	9.70059
1990	10.11503
1995	10.33295
2000	10.44304
2005	10.63445
2010	10.93881
2015	11.16135
2020	11.28468
2025	11.26321
2030	11.18594
2035	11.06047
2040	10.88243
2045	10.64323
2050	10.3513
2055	10.04163
2060	9.71604
2065	9.3938
2070	9.0861
2075	8.80496
2080	8.54024
2085	8.28732
2090	8.03551
2095	7.80211
2100	7.57294