*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19740
19750
19760
19771
19781
19791
19800
19810
19820
19834
19841
19851
19861
19870
19880
19890
19900
19910
19924
19937
19940
199511
19960
19970
19980
19991
20000
20010
20020
20031
20040
20052
20061
20070
20081
20090
20102
20113
20122
20133
20140
20152
20160
20173
20187
201912
20206
202113
202217
202319
20240
Total128