*Excludes Observations that spanned multiple years

Pre 19703
19700
19712
19720
19730
19740
19750
19760
19770
19781
19790
19801
19810
19820
19831
19842
19852
198614
19870
19885
19898
19904
19914
199219
19939
199456
199543
19964
199714
19986
199922
20001
20014
200221
200318
200446
200550
200620
20078
200817
20095
201047
201185
201223
201316
201428
201514
201615
201720
20180
Total658