*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19861
19870
19881
19890
19901
19916
19920
19930
19944
199512
199611
19973
19981
19990
20000
20010
20020
20030
20042
20050
20060
20072
200824
200926
201026
20119
201213
201318
201424
201511
20167
20170
20180
20190
20200
20210
20220
20230
20240
Total203