*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19751
19760
19770
19782
19790
19801
19811
19820
198310
19840
19850
19866
19872
19887
19899
199015
19912
199226
199321
199417
199518
19967
19979
199822
199911
20004
200113
20021
200310
200461
200524
20063
20074
200810
20094
201032
201164
20121
20135
201414
201518
201620
201752
20180
Total530