*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19981
19991
20001
20011
20020
20031
20041
20053
20066
20072
20082
20091
20100
20110
20121
20132
20142
20150
20161
20171
20185
20191
20200
20217
202219
202312
20242
Total74