Year	1=low to 6=high
2005	2.9782608695652173
2006	2.88
2007	2.86
2008	2.84
2009	2.9615384615384617
2010	2.980769230769231
2011	2.982142857142857
2012	2.95
2013	2.935483870967742
2014	2.9838709677419355
2015	2.967741935483871
2016	2.9193548387096775
2017	2.8125
2018	2.8225806451612905
2019	2.78125
2020	2.734375
2021	2.661290322580645
2022	2.640625
2023	2.546875