*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19793
19802
19812
19822
19832
19844
19852
19863
19873
19884
19894
19904
19913
19922
19930
199429
199532
199634
199776
19987
1999132
200010
200132
200220
200317
200425
200519
200625
200745
200839
200953
201054
201139
201266
201324
201433
201516
20162
20170
20180
Total870