*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
197813
19790
19800
19810
19821
19830
19840
19850
19861
19870
19883
19890
19900
19911
19920
19930
19941
19951
19963
19972
19980
19990
20001
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20125
20136
20140
20150
20161
20170
20185
20196
20206
20210
20224
20230
20240
Total63