*Excludes Observations that spanned multiple years

Pre 19707
19700
19710
19720
19730
19742
19750
19761
19771
19780
19791
19800
19810
19820
19830
19842
19850
19860
19870
19880
19890
19900
19910
19921
19930
19940
19952
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20061
20070
20080
20090
20100
20110
20121
20131
20140
20150
20164
20171
20180
20190
20202
20212
20224
20233
20242
Total38