PERIOD	VALUE
1997	56350
1998	55639
1999	53856
2000	68040
2001	78036
2002	68632
2003	84010
2004	69860
2005	95965
2006	115581
2007	154352
2008	143714
2009	128854
2010	118047
2011	92685
2012	111221
2013	102277
2014	94607
2015	83844
2016	92642
2017	102562
2018	110672
2019	109895
2020	135504