*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19741
19752
19760
19770
19780
19790
19800
19810
19820
19830
19842
19850
19860
19870
19880
19890
19901
19910
19921
19930
19940
199513
19960
19979
19983
19993
20000
20010
20023
20034
20040
20051
20063
20071
20082
20090
20105
20118
20123
20135
20144
20157
20163
20174
20181
20193
20203
20210
20222
20230
20240
Total98