*Excludes Observations that spanned multiple years

Pre 197027
19700
19710
19720
19730
19741
19752
19760
19775
19781
19790
19800
19811
19821
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
199513
199635
199746
19980
199922
20000
20010
20020
20031
20040
20050
20060
20070
20080
20090
20100
20110
20121
20131
20140
20150
20162
20170
20180
20190
20200
20210
20221
20230
20240
Total160