*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19751
19760
19771
19781
19792
19801
19811
19820
19831
19840
19851
19860
19872
19881
19890
19903
19915
199219
199312
19948
19955
19963
19976
19985
19991
20000
20012
20021
20031
20041
20050
20063
20072
20082
20090
20103
20116
20122
20139
20142
20155
20166
201717
201815
201910
20200
20210
20220
Total168