*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19741
19752
19763
19770
19780
19790
19801
19810
19820
19830
19840
19850
19860
19872
19883
19894
19906
19913
19921
19933
19942
19951
19964
19971
19986
19994
200017
200122
200221
200354
200450
2005108
200684
200715
200833
200928
201065
201154
201230
201321
201414
201527
20163
20170
20180
Total693