*Excludes Observations that spanned multiple years

Pre 197060
19700
19711
19720
19731
19742
19752
19763
19771
19781
19792
198014
19810
19824
19832
19840
198587
198694
198757
198831
198944
199065
199117
199235
1993111
199429
1995260
199695
1997568
1998824
1999650
20004550
20011046
2002679
20039338
200412838
20052850
20061636
20071710
20081613
20098271
20101415
20111138
20121370
20131060
20141241
20151255
20161060
20171363
2018295
Total57788