*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19821
19830
19840
19850
19862
19872
198814
19892
19907
199121
199213
19934
19940
19950
19960
19970
19981
19991
20000
20010
20020
20030
20041
20050
20061
20070
20080
20091
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20225
20233
20246
Total88