Year	% of tax revenue
1999	51.567841316733485
2000	64.29366948786786
2001	63.80947044037492
2002	62.77892619309184
2003	62.1953133266957
2004	69.66627333742998
2005	70.45689723646348
2006	77.07554686856108
2007	74.78319278431033
2008	74.06794937028404
2009	67.68231061432522
2010	50.55917423261748
2011	50.476356330899065
2012	62.35235225514024
2014	54.194367030745546
2015	50.85886693586653
2016	40.30593925681939
2017	45.55420147271786
2018	39.24180276539396
2019	38.660558642820675
2020	45.32168927986851
2021	36.89670189348963