*Excludes Observations that spanned multiple years

Pre 19706
19700
19711
19720
19730
19740
19750
19760
19770
19780
19791
19801
19810
19820
19830
19841
19850
19860
19870
198813
19893
19908
199131
199213
19936
19945
19950
199610
199715
19980
19993
20000
20010
20020
20030
20043
20050
20065
20073
200810
200911
20101
20110
20120
20134
20141
20152
201611
20171
20181
20198
20202
202111
202218
202318
20246
Total233