Year	annual % change
1998	-67.4000015258789
1999	-9.5
2000	41.1924133301
2001	60.100769043
2002	-14.0900001526
2003	62.5900001526
2004	49.7999992371
2005	32.8298374973
2006	1.5090272164
2007	1.8688611627289675
2008	-58.7064158024
2009	2.1896525738
2010	39.41442846611194
2011	-17.3405462950079
2012	9.01754704817075
2013	31.6579021063842
2014	-32.6404280806232
2015	18.2762410736435
2016	1.81104608421485
2017	40.6085539719881
2018	-20.0831461989562
2019	48.5620369499833
2020	3.57057214324368