Year	Percent
1950	13.60065
1955	13.73882
1960	11.45988
1965	7.40658
1970	12.11528
1975	9.95533
1980	12.84269
1985	11.75251
1990	7.80976
1995	8.23401
2000	8.00614
2005	8.12976
2010	7.62075
2015	7.15683
2020	6.40307
2025	6.15857
2030	6.14635
2035	6.08986
2040	5.89292
2045	5.58736
2050	5.31802
2055	5.20844
2060	5.24467
2065	5.28307
2070	5.23046
2075	5.10061
2080	4.98039
2085	4.92682
2090	4.94436
2095	4.97505
2100	4.96486