*Excludes Observations that spanned multiple years

Pre 19708
19700
19710
19720
19730
19740
19752
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19872
198813
19890
19900
19912
19920
19930
19940
19950
19960
19971
19980
19992
20000
200116
20029
20032
20042
20051
20061
20072
20081
20090
20104
20112
20120
20130
20140
20150
20163
20176
20187
201925
202032
202121
202221
202333
202445
Total263