*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19801
19810
19820
19831
19840
19850
19860
19870
19881
19890
19900
19911
19920
19930
19942
19950
19960
19970
19980
19990
20000
20010
20021
20030
20040
20050
20061
20075
20083
20093
20100
20110
20127
20131
20140
20150
20160
20171
20180
20190
20202
20210
20220
20232
20240
Total33