*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19772
19782
19790
19800
19811
19820
19831
19840
19850
19862
19872
198817
19895
199012
19918
199215
199327
199418
199529
199613
19972
19987
19995
20003
20013
20020
200310
200415
20056
20066
200717
200813
200919
201010
201114
201214
201310
201414
20159
201615
201716
201810
201911
20206
202116
202216
20236
20245
Total435