Year	Percent
1950	9.78377
1955	10.69571
1960	10.88591
1965	11.17721
1970	9.64079
1975	9.84559
1980	11.08005
1985	11.25984
1990	10.90307
1995	10.78042
2000	10.61145
2005	11.24858
2010	12.12335
2015	11.44028
2020	10.36112
2025	10.20741
2030	10.23405
2035	10.11697
2040	9.76035
2045	9.30064
2050	8.88674
2055	8.57514
2060	8.33178
2065	8.08418
2070	7.80093
2075	7.48629
2080	7.19775
2085	6.93387
2090	6.70541
2095	6.48889
2100	6.28031