*Excludes Observations that spanned multiple years

Pre 19701
19700
19711
197215
197312
19740
19750
19760
19770
19780
19790
19801
19811
19820
19830
198417
19850
19864
198712
198870
19895
199015
199142
19923
19939
19940
19951
19962
19972
19982
19992
200019
200110
20022
20030
20040
20053
20060
20071
20080
20090
20100
20110
20120
20130
20140
20151
20165
20171
20180
20190
Total259