Year	Percent
1950	9.89854
1955	7.76851
1960	10.17485
1965	11.59634
1970	11.38011
1975	8.57253
1980	7.47199
1985	8.06227
1990	8.89694
1995	9.21834
2000	8.01154
2005	7.01844
2010	5.62391
2015	4.97013
2020	5.60272
2025	5.39907
2030	4.97408
2035	4.58574
2040	4.34836
2045	4.23954
2050	4.34916
2055	4.50429
2060	4.52336
2065	4.42969
2070	4.36384
2075	4.38628
2080	4.51103
2085	4.66982
2090	4.76298
2095	4.76164
2100	4.70705