Year	Number
1996	-0.517743170261383
1998	-0.492162376642227
2000	-0.066172294318676
2002	-0.0931836739182472
2003	-0.368299216032028
2004	-0.341314166784287
2005	-0.339232921600342
2006	-0.267819613218308
2007	-0.120370902121067
2008	-0.222542554140091
2009	-0.305793792009354
2010	-0.499709248542786
2011	-0.269735813140869
2012	-0.348777562379837
2013	-0.249215871095657
2014	-0.0407801233232021
2015	-0.092195525765419
2016	-0.0954835712909698
2017	-0.0538232065737247
2018	-0.950931131839752
2019	-0.992481052875519
2020	-0.58572518825531
2021	-0.47199821472168
2022	-0.34842848777771