*Excludes Observations that spanned multiple years

Pre 19702
19701
19712
197242
197337
19740
19750
19760
19772
19780
19792
19800
19810
19820
19831
19844
19858
19860
198724
198863
198919
199041
1991149
199290
199358
199420
199527
199635
199735
19984
199914
200041
200116
20027
20035
200428
20052
20067
200719
200829
20098
20104
20111
20120
20130
20141
20152
20162
20173
20182
20191
20202
Total860