*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19862
198719
198840
19890
19902
19913
19922
19934
19943
19959
19960
19975
19980
19995
200010
20011
200212
20031
20042
20050
20060
20070
20082
20094
20105
20113
20121
20130
20141
20151
20162
20172
20180
20191
20200
20210
20220
Total143