*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19831
19840
19850
19862
19872
19880
19890
19900
19912
19923
19934
19945
19957
19961
19972
19980
19991
20002
20012
20020
20036
20047
20055
20060
20073
20083
20098
201013
201114
201232
201332
201411
20154
20167
20171
20182
20192
20200
20211
20220
20230
20240
Total187