*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19741
19750
19760
19770
19780
19791
19800
19810
19820
19830
19842
19854
19862
19870
19881
19893
199011
199127
1992116
199341
19947
199577
19962
19970
199823
199923
200010
200141
200221
200321
200469
20053
20063
200710
20084
20098
20107
20117
20124
20136
20147
20157
20168
20175
201816
201923
20200
20210
Total622