*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19781
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19891
19901
19913
19924
19934
19942
199511
19966
19970
19980
199910
200012
20013
20021
20033
20041
20055
20065
20071
20087
20093
20104
20119
20121
20133
20140
20151
20165
20179
20180
20190
20202
20213
20221
20233
20240
Total128