Year	% of population
2001	2.809812956658643
2002	2.8543787276998467
2003	2.927589847017342
2004	2.9893874956854356
2005	2.9942315791167093
2006	2.9772245871800136
2007	2.964312507877114
2008	3.002738485438655
2009	3.0217206096447633
2010	3.035066515276266
2011	2.9467154195751446
2012	2.878054818794117
2013	2.8240550530201145
2014	2.78041056569188
2015	2.737997863262587
2016	2.7126354035909976
2017	2.6986557194917236
2018	2.668348836812518
2019	2.63884735792734
2020	2.6620023454915622
2021	2.7211459560091997