Year	Percent
1950	9.43054
1955	9.42696
1960	9.32488
1965	8.02814
1970	11.01629
1975	11.2711
1980	11.47137
1985	10.9729
1990	10.28449
1995	10.54526
2000	10.73564
2005	10.53665
2010	8.87299
2015	7.3375
2020	6.61453
2025	6.85045
2030	7.91415
2035	7.52392
2040	6.81948
2045	6.09289
2050	5.67686
2055	5.6911
2060	5.88439
2065	5.93981
2070	5.75029
2075	5.44109
2080	5.22432
2085	5.1813
2090	5.24088
2095	5.28103
2100	5.23116