*Excludes Observations that spanned multiple years

Pre 19702
19700
19712
19720
19730
19740
19750
19760
19770
19780
19791
19800
19811
19820
19831
19840
19850
19860
19870
198840
19890
19901
19913
19924
199321
19942
199525
19969
19977
19980
19990
20002
20011
20020
20030
20043
20053
20061
20070
20080
20090
20100
20111
20121
20130
20140
20150
20166
20171
20183
20193
20201
20214
20222
20233
20240
Total154