*Excludes Observations that spanned multiple years

Pre 1970183
197010
19711
19724
19731
19741
197513
19764
19771
19783
19791
19804
19812
19820
19830
19842
19851
19860
19871
19880
19890
19901
19910
199210
199312
19948
19951
19961
19970
19985
19991
20001
20010
20027
20030
20041
200537
200669
20073
200813
200953
201039
201115
201210
20136
20142
20151
20162
20174
201811
20191
20200
20213
20222
20230
20240
Total551