*Excludes Observations that spanned multiple years

Pre 19701
19700
19712
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19851
198611
198735
19887
19890
19902
199137
199210
19933
19940
199519
199626
199724
19985
19992
20004
20011
20020
20030
20040
20050
20060
20070
20080
20092
20100
20111
20120
20131
20140
20150
20160
20171
20180
20190
20201
20210
20220
20230
20240
Total197