*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19721
19730
19740
19750
19761
19772
19782
19791
19801
19814
19821
19831
19841
19850
19861
19870
19880
19892
19901
19910
19922
19931
19940
19951
19960
19973
199812
199910
20004
20017
20022
2003505
2004473
2005177
2006172
200797
2008161
20094231
201078
2011252
2012231
2013136
2014135
2015253
2016148
2017242
20187
Total7362