Year	1=low to 6=high
2005	3.1672727272727266
2006	3.1410714285714283
2007	3.1584905660377354
2008	3.1641509433962263
2009	3.1907407407407398
2010	3.1944444444444433
2011	3.1927272727272724
2012	3.199999999999999
2013	3.185964912280701
2014	3.171153846153847
2015	3.1788461538461528
2016	3.1714285714285717
2017	3.16734693877551
2018	3.159183673469387
2019	3.1540000000000004
2020	3.1291666666666664
2021	3.129166666666667
2022	3.1163265306122456
2023	3.1244897959183677