*Excludes Observations that spanned multiple years

Pre 19707
19700
19710
19720
19730
19740
19751
19760
19770
19780
19792
19800
19811
19821
19830
19840
19852
19860
19873
198824
19892
19901
199115
199213
199332
19943
199576
199612
199720
19980
199929
200025
200115
20022
20033
20043
20053
20064
20079
200821
20099
201020
201112
20124
20136
201414
20157
20167
201711
201813
201919
202013
202151
202228
202321
202410
Total574