*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19741
19751
19760
19770
19781
19791
19802
19812
19820
19833
19841
19850
19862
19870
19880
19890
19900
199111
199216
19939
199410
19952
19960
19977
19980
19995
20001
200144
20021
200332
20040
20051
20063
20070
20087
20091
201043
201139
20125
201322
20147
20154
201626
201741
201883
201979
2020100
202196
2022136
2023116
20246
Total968