*Excludes Observations that spanned multiple years

Pre 19704
19701
19710
19720
19730
19740
19750
19760
19770
19780
19791
19801
19811
19820
19830
19840
19852
19863
198710
1988102
19893
199018
199141
19925
199317
19942
199524
19967
19972
19983
19992
200019
200111
20024
20030
20040
20053
20061
20073
20081
20090
201013
20111
20121
20131
20140
20152
20166
20176
20185
20195
202015
202115
202236
202340
20245
Total442