Year	Percent
1950	10.11924
1955	10.47926
1960	10.42578
1965	10.4969
1970	10.30713
1975	10.59869
1980	10.8217
1985	12.67286
1990	10.63302
1995	9.3887
2000	9.07952
2005	9.45283
2010	8.26089
2015	7.64836
2020	7.17926
2025	7.18117
2030	6.96365
2035	6.72429
2040	6.50447
2045	6.27691
2050	6.05168
2055	5.88117
2060	5.77053
2065	5.68064
2070	5.58348
2075	5.47115
2080	5.36865
2085	5.29244
2090	5.23924
2095	5.19775
2100	5.15498