*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19743
19751
19760
19770
19781
19791
19801
19811
19822
19831
19841
19851
19863
19875
19882
19890
19900
19913
19923
19932
19943
19952
199618
199722
19986
19994
20001
20011
20023
20030
20043
20052
20060
200710
200810
20091
20101
20118
20126
201311
20141
20150
20166
20172
20184
20192
20200
20210
20220
20232
20242
Total162