Year	% of population
2001	4.090203992495964
2002	3.9381141983083188
2003	3.8000117783895493
2004	3.6333877582469105
2005	3.5119166927674206
2006	3.3934373506737496
2007	3.31172320966158
2008	3.2645035238593407
2009	3.11267620187774
2010	2.962140494079186
2011	2.8088988645148274
2012	2.7752239758498387
2013	2.7547862116782222
2014	2.7346790806147867
2015	2.7109556709629405
2016	2.6897621537757663
2017	2.658912337370538
2018	2.6451681017548236
2019	2.6745156306747453
2020	2.6930180511817485
2021	2.7307052580398716