*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19741
19751
19760
19770
19780
19790
19800
19810
19821
19831
19840
19853
19860
19870
19880
19890
19900
19910
19920
19932
19941
19950
19961
19970
19980
19991
20000
20010
20020
20031
20041
20053
20061
20070
20082
20091
20106
20110
20121
20133
20149
20152
20160
20170
20181
20190
20201
20212
20221
20230
20240
Total48