*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
197220
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19832
198452
198544
198665
198792
198890
198960
199078
199171
199240
199322
199412
199515
199612
199718
19983
199920
200050
200123
200219
200358
200435
200549
200643
200739
200833
200945
201041
201151
201296
201349
201440
201546
201642
201730
20180
20190
Total1505