*Excludes Observations that spanned multiple years

Pre 1970128
19700
19710
19720
19730
19740
19752
19760
19773
19782
19797
19802
19813
19821
19830
19841
19851
19860
19872
19886
198915
199027
199124
199241
199321
199417
199533
199617
199730
1998103
1999122
200070
2001120
200266
200389
200466
200511
20069
200717
20088
200914
20106
201127
201217
20137
20141
201594
20165
20170
Total1235