*Excludes Observations that spanned multiple years

Pre 19702
19701
19710
19720
19730
19740
19750
19760
19770
19783
19790
19800
19810
19823
19837
19841
19851
19861
19873
198824
198918
19909
199152
19928
199351
199412
199517
199611
19975
19985
19992
20003
200119
20027
20031
20042
20058
20065
20070
200818
200911
20102
20117
20121
20131
20140
20150
20163
20175
201814
20194
20204
202127
202224
202324
20242
Total428