*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19850
19860
19870
198810
19890
19900
19911
19925
19930
19942
19956
199622
19977
19980
19990
20000
20010
20020
20030
20040
20050
20062
20070
20081
20090
20101
20114
20121
20132
20143
20150
20163
20170
20182
20190
20200
20210
20221
20231
20240
Total77