*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19751
19761
19770
19780
19791
19801
19810
19820
19831
19840
19850
19861
19875
19881
198925
19900
19913
19921
199323
199423
199558
199617
19974
199816
19993
200015
20011
20023
20034
200414
200512
20069
200711
20081
20094
201018
20119
201217
20133
201415
201517
201617
201722
201827
201931
202040
202157
202265
202344
202467
Total709