*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19761
19770
19780
19792
19800
19810
19820
19834
19842
19850
19868
19875
198819
19890
19900
19916
199210
199331
19944
199512
19961
19971
19980
19991
20000
20011
20023
20031
20044
200513
20062
20071
200812
20095
20101
20113
20123
20135
20142
20153
20167
201719
201837
201921
202031
202113
202241
202390
202411
Total436