*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19732
19742
19751
19760
19770
19780
19792
19805
19811
19821
19833
19844
19850
19860
19870
19880
19890
19902
19910
19924
19931
19946
19951
19961
19972
19980
19991
20003
20011
20021
200312
20040
20051
20062
20070
20085
20090
201018
201115
20123
20133
20141
20150
20164
20175
201816
201917
202018
20217
20226
20231
20240
Total178