Year	Percent
1950	9.4233
1955	8.73718
1960	8.22898
1965	9.28508
1970	11.13695
1975	9.50752
1980	10.93798
1985	12.13466
1990	10.46336
1995	7.9583
2000	8.12316
2005	9.93081
2010	7.49054
2015	5.78517
2020	5.51351
2025	5.69551
2030	5.91786
2035	5.60154
2040	5.13529
2045	4.84561
2050	4.75588
2055	4.82569
2060	4.94355
2065	4.97411
2070	4.89717
2075	4.8005
2080	4.77537
2085	4.82755
2090	4.90563
2095	4.93807
2100	4.91241