Year	Number
1996	1.95087599754333
1998	1.91207957267761
2000	1.81612300872803
2002	1.83372235298157
2003	1.83412086963654
2004	2.05889225006104
2005	1.85913348197937
2006	1.87561547756195
2007	2.01804304122925
2008	1.83281362056732
2009	1.83760952949524
2010	1.87354242801666
2011	1.83171236515045
2012	1.8999354839325
2013	1.87718820571899
2014	1.82209897041321
2015	1.83404910564423
2016	1.83302903175354
2017	1.94412314891815
2018	1.84516203403473
2019	1.82778358459473
2020	1.88818657398224
2021	1.79795169830322
2022	1.94218063354492