*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19821
19831
19840
19850
19861
19871
19881
19890
19904
19912
19920
199329
19944
19953
19966
199737
19980
199951
200037
200142
20027
20031
20040
20050
20060
20070
20083
20090
20103
20112
20121
20133
20141
20151
20161
20170
20180
20195
20202
20211
20221
20230
20240
Total255