*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
198210
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19981
19990
20000
20010
20020
20030
20041
20052
20060
20072
20081
20091
20100
20110
20123
20132
20141
20151
20160
20173
20189
20194
20207
202123
202215
202318
20245
Total109