*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
19720
19731
19740
19750
19761
19771
19781
19790
19800
19810
19820
19830
19840
198515
19860
19870
19885
19892
199016
199160
199242
199391
199415
199529
19964
19977
19982
19990
20000
20010
20025
20038
200415
20053
200613
20075
20088
200923
201015
201118
20129
201310
201411
20152
20167
201730
20186
20192
20206
202114
20227
202314
202410
Total534