*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19902
19912
19920
19930
199416
19952
19962
19971
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20106
201115
20129
201311
20145
201519
20166
20170
20180
20190
20200
20210
20220
20230
20240
Total97