*Excludes Observations that spanned multiple years

Pre 197021
19700
19710
19720
19730
19742
19753
19761
19770
19781
19792
19801
19811
19820
19832
19841
19851
19860
19870
19880
19890
19900
19910
19923
19933
19944
19952
19960
19971
19980
19992
20001
20010
20020
20030
20040
20052
20061
20070
20081
20095
20104
20111
20120
20131
20142
20151
20161
20178
20187
20196
202010
20217
20220
20233
20241
Total113