*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
199555
199622
199741
1998103
1999122
200070
2001132
2002108
200389
200466
200511
20069
200717
20088
200914
20107
201127
201258
2013118
201482
2015186
2016209
201797
201895
201958
20203
202141
202227
Total2178