*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
197324
197448
19750
19760
19770
19781
19790
19804
19814
19825
19836
19845
19856
19869
198719
198828
198920
199075
199117
19926
199324
199422
19959
199622
199712
199829
199928
200059
200144
200269
200373
200480
200554
200675
200783
200879
2009163
2010114
201178
201252
201371
201415
20150
20160
20170
Total1534