*Excludes Observations that spanned multiple years

Pre 19701
19700
19711
19720
19730
19742
19750
19760
19770
19780
19790
19801
19810
19821
19831
19843
19856
19861
19872
19881
19890
199014
199111
199216
19938
199416
19956
199613
199752
19982
199915
20000
20014
20028
20035
20045
20050
20062
20072
20081
20094
20101
20111
20125
201311
20140
20157
20161
20174
20180
20193
20200
20210
20224
20235
20240
Total246