*Excludes Observations that spanned multiple years

Pre 19706
19700
19710
197210
19730
19740
19750
19761
19770
19780
19791
19803
19810
19821
198311
19846
19859
198664
198729
198821
198939
19908
199159
199286
1993116
1994106
1995175
199667
199775
199854
199972
200027
200155
200268
200319
200490
2005111
200624
200724
200832
200912
201024
201131
20120
20130
20141
20152
201614
201711
20180
Total1564