*Excludes Observations that spanned multiple years

Pre 197022
19700
19711
19720
19730
19741
19750
19760
19770
19780
19790
19800
19811
19820
19830
19841
19855
19867
19879
19885
19891
19905
19911
19922
19932
19940
19950
19961
19972
19985
19994
200010
200113
20023
20039
20049
20058
20065
20071
20081
20090
20101
20110
20120
20130
20141
201513
201621
20175
20182
20192
20205
20219
20224
20230
20240
Total197