Year	Percent
1950	10.75968
1955	7.26099
1960	7.07719
1965	8.58345
1970	9.63049
1975	9.32877
1980	8.18007
1985	7.37276
1990	7.34843
1995	7.57613
2000	8.14794
2005	7.48799
2010	5.44754
2015	4.85617
2020	5.77969
2025	6.51658
2030	6.04027
2035	5.52437
2040	5.20083
2045	5.20068
2050	5.41888
2055	5.59049
2060	5.51989
2065	5.28785
2070	5.10419
2075	5.08163
2080	5.16964
2085	5.23885
2090	5.19418
2095	5.0457
2100	4.90456