*Excludes Observations that spanned multiple years

Pre 19704
19700
19711
19720
19731
19740
19752
19760
19771
19780
19790
19800
19810
19822
19830
19840
19856
19863
19875
198834
19895
19905
199115
199247
199337
19946
199533
19964
199713
19983
199945
200036
200131
200212
20033
200437
20052
200611
200725
20083
200914
20103
201110
20120
20135
20141
20150
20163
20172
20183
20194
20203
20217
202212
20233
20240
Total502