*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19905
19914
19920
19930
199411
19954
19969
19971
19980
19990
20000
20012
20020
20030
20042
20052
20062
20071
200843
20092
201013
201110
201221
201323
201417
201518
20163
20170
20180
20190
20201
20210
20220
20230
20240
Total195