Year	Percent
1950	10.19445
1955	10.2904
1960	10.24862
1965	9.83228
1970	9.6341
1975	9.92035
1980	9.66501
1985	9.26108
1990	9.11287
1995	11.10987
2000	12.27869
2005	12.65847
2010	10.76993
2015	7.74494
2020	7.66064
2025	8.11647
2030	9.20274
2035	8.98975
2040	8.05911
2045	6.92319
2050	6.20645
2055	5.98751
2060	6.02519
2065	5.98744
2070	5.73958
2075	5.38152
2080	5.09676
2085	4.99235
2090	5.02343
2095	5.06779
2100	5.02559