*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19863
198725
198820
19896
199026
199129
19923
199340
199412
199511
199617
199727
19983
199916
20008
200125
20029
200344
200442
200519
200623
200741
200840
200941
201033
201133
201226
201333
201430
201525
201643
201724
201828
201912
20202
202113
20225
20230
20241
Total838