*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19737
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19851
19860
19871
19883
19890
19900
19910
19920
19930
19940
19950
19960
19971
19981
19991
20000
20010
20020
20030
20040
20050
20060
20070
20082
20090
20100
20112
201219
20136
201433
201516
201660
20174
20185
201930
202028
202141
202230
202330
20242
Total326