*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19860
19873
198815
19890
19901
19910
19920
19930
19940
19951
19960
19971
19980
19992
20002
20010
20021
20030
20040
20050
20060
20077
20081
20090
20103
20110
20120
20131
20140
20150
20161
20172
20181
20190
20203
20211
20226
20230
20240
Total57