Year	Percent
1950	8.87803
1955	10.09904
1960	5.16592
1965	7.38033
1970	8.38999
1975	8.66545
1980	7.63541
1985	6.00435
1990	6.33262
1995	6.73262
2000	7.65008
2005	7.77463
2010	5.59165
2015	4.00411
2020	4.44187
2025	5.10932
2030	6.07183
2035	5.87811
2040	5.46341
2045	4.94585
2050	4.79735
2055	5.14133
2060	5.61124
2065	5.81505
2070	5.67851
2075	5.41298
2080	5.26506
2085	5.3343
2090	5.50897
2095	5.60706
2100	5.55186