*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19771
19781
19790
19800
19810
19820
19830
19840
19850
19860
19871
19882
19890
19900
19911
19920
19930
19940
19950
19961
19970
19980
19991
20000
20010
20020
20030
20040
20054
20060
20070
20080
20090
20100
20112
20129
201319
20140
20151
20163
20170
20181
20191
20200
20211
20220
20231
20240
Total52