*Excludes Observations that spanned multiple years

Pre 19706
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19860
19870
19883
19890
19900
19910
19926
19936
19940
19950
19960
19971
19981
19991
20002
20011
20020
20030
20040
20050
200610
20070
20081
20090
20100
20110
20120
20131
20141
20150
20163
20171
20181
20190
20205
202113
20222
20231
20241
Total69