Year	Percent
1950	6.42296
1955	8.07312
1960	9.67435
1965	9.14189
1970	7.75123
1975	7.14072
1980	6.95733
1985	8.61365
1990	9.09102
1995	7.02888
2000	6.64459
2005	6.10575
2010	4.49029
2015	4.73572
2020	5.61551
2025	5.46602
2030	5.35387
2035	5.10897
2040	4.78852
2045	4.66105
2050	4.90516
2055	5.19957
2060	5.2906
2065	5.23177
2070	5.11498
2075	5.03775
2080	5.08531
2085	5.22227
2090	5.30876
2095	5.27707
2100	5.16511