*Excludes Observations that spanned multiple years

Pre 197012
19701
19711
19720
19730
19741
19752
19761
19777
19783
19790
19801
19811
19821
19836
19840
19852
198618
198729
1988131
198918
199027
1991103
1992188
1993190
199454
1995157
199622
199731
199823
199953
200040
200148
200229
200318
200471
200518
200631
200791
200825
200923
201091
201111
20129
201316
201412
201513
201617
201722
20185
201911
20207
20211
20220
Total1692