*Excludes Observations that spanned multiple years

Pre 19701
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19853
19861
19872
198812
19891
19900
199117
19924
199324
19940
199510
19967
19978
19981
19992
20000
20011
20021
20031
20040
20051
20060
20070
20080
20090
20100
20110
20120
20132
20140
20150
20161
20170
20180
20191
20200
20210
20222
20235
20240
Total110