*Excludes Observations that spanned multiple years

Pre 19708
19701
19711
19720
19730
19740
19750
19760
19778
19782
19790
19801
19810
19820
19831
19840
19851
19869
19875
198835
19892
199018
199171
1992140
1993109
199429
1995118
199624
19974
19980
199964
200059
200125
20029
200312
200414
20059
200639
200767
200819
20099
20105
201113
201219
201315
20147
201515
201614
201723
20187
201913
20200
20211
20222
20234
20242
Total1053