Year	1=low to 6=high
2005	3.051282051282051
2006	3.051282051282051
2007	3.0125
2008	3.048780487804878
2009	3.0609756097560976
2010	3.0853658536585367
2011	3.0595238095238093
2012	3.0476190476190474
2013	3
2014	3.024390243902439
2015	3.024390243902439
2016	3
2017	3
2018	2.986842105263158
2019	2.948717948717949
2020	3.013157894736842
2021	3.0657894736842106
2022	3.076923076923077
2023	3.1025641025641026