*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19731
19741
19750
19760
19772
19782
19791
19800
19810
19823
19831
19842
19855
19865
19876
198812
198910
199024
199141
199275
199390
199429
199551
199645
199745
199819
19996
20004
20017
200227
200315
200440
20052
20065
200727
200841
200922
201040
201133
201236
201355
201414
201515
201627
20176
20186
20194
20202
20213
20225
20234
20240
Total918