*Excludes Observations that spanned multiple years

Pre 19703
19701
19710
19720
19730
19740
19751
197611
197711
19780
19791
19802
198110
19820
19830
19841
19853
19861
19870
198816
19892
199015
199155
199272
199330
199410
199516
199628
199753
199840
19994
20002
200182
20023
200344
20049
20056
200638
200710
20080
20093
201062
201167
201210
201395
2014127
2015106
2016157
2017184
2018131
2019143
20201
Total1666