*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19741
19751
19760
19771
19780
19790
19800
19810
19820
19832
19841
19850
19860
19870
19886
19890
199020
199128
199217
199317
19943
19956
19960
19970
19980
19990
20000
20011
20026
20030
20040
20050
20063
20070
20082
20092
20101
20110
20121
20131
20141
20150
20169
20170
20181
20190
20200
20210
20220
Total132