*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19743
19752
19761
19772
19780
19790
19800
19810
19823
19831
19841
19853
19863
198722
198810
19893
19909
199124
199215
199322
199412
199529
199612
199734
199824
199913
20006
200121
20027
200314
200415
200513
200627
200728
200816
200926
201038
201145
201229
201324
201427
201527
201639
201715
201813
20197
20202
202121
202210
20232
20240
Total720