*Excludes Observations that spanned multiple years

Pre 197069
19705
19710
19720
19731
19741
19752
19760
19773
19780
19790
19801
19813
19823
19830
19840
19850
19861
19871
198814
198912
199046
199112
19927
199311
199412
199539
199627
199756
199835
199921
200053
200164
2002176
200332
200426
200546
200639
200731
200836
200925
201028
201141
201240
201332
201447
201543
201635
201730
201848
201933
202016
202127
202219
202318
20241
Total1368