*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19732
19740
19750
19760
19770
19781
19790
19800
19810
19820
19836
19841
19853
19865
198749
19883
198914
19902
19910
19922
19930
19943
199530
19960
19979
19982
19992
200010
20013
20020
20031
20044
20054
20065
200735
200814
200914
201018
201111
20125
201318
201419
20152
20167
20170
20182
20190
20200
20211
20220
20235
20240
Total313