*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19731
19741
19750
19762
19771
19780
19790
19800
19810
19820
19830
19840
19852
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19973
19980
19991
20001
20010
20020
20030
20040
20051
20060
20071
20080
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20231
20240
Total17