Year	% of working-age population
1990	4.2096487292991345
1991	4.204082403593899
1992	4.198273594696398
1993	4.198442133135048
1994	4.209421147249677
1995	4.228410273938109
1996	4.253472700307242
1997	4.285189901865309
1998	4.332920515034436
1999	4.394998653657189
2000	4.458188342571975
2001	4.533918981639343
2002	4.6321971465362894
2003	4.7347730428599615
2004	4.823318683598714
2005	4.895886283714074
2006	4.953925350188001
2007	4.998447052009493
2008	5.041049686928481
2009	5.089958657319162
2010	5.1444824541511265
2011	5.206497751051596
2012	5.2771355837985
2013	5.343676311012448
2014	5.4233398065890395
2015	5.515700218681766
2016	5.604866633041792
2017	5.701842176921439
2018	5.807014058591287
2019	5.918927824342369
2020	6.012004828187278
2021	6.072615346270705
2022	6.122238590710922
2023	6.190328343555336