Year	Percent
1950	7.50509
1955	7.55002
1960	7.483
1965	8.64942
1970	7.40146
1975	5.66983
1980	6.20569
1985	6.9028
1990	7.85354
1995	5.89217
2000	5.75341
2005	5.48955
2010	4.75421
2015	4.56859
2020	4.67652
2025	4.41121
2030	4.40921
2035	4.41249
2040	4.41165
2045	4.34979
2050	4.33906
2055	4.38625
2060	4.42994
2065	4.48521
2070	4.54782
2075	4.58744
2080	4.60549
2085	4.62049
2090	4.64136
2095	4.65934
2100	4.66518