*Excludes Observations that spanned multiple years

Pre 19709
19702
19718
19720
19730
19740
19750
197616
197724
19783
19792
19803
198123
19820
19831
19843
19858
198621
198712
1988120
198914
199027
1991205
1992244
1993208
1994132
1995159
1996114
1997104
199845
199981
200041
2001155
200263
200395
200478
200568
200697
200730
200830
200937
2010220
2011164
201228
2013124
2014167
2015206
2016243
2017348
2018264
2019295
20200
20211
20220
Total4342