*Excludes Observations that spanned multiple years

Pre 19705
19701
19710
19720
19730
19740
19751
19760
19770
19781
19791
19801
19810
19820
19830
19840
19852
19860
19870
19880
19891
19902
19910
19921
19930
19940
19950
19966
19970
19986
19992
20000
20011
20020
20032
20041
20050
20060
20070
20081
20090
201029
20110
20120
20135
20141
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total70