*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
197283
19733
19740
19750
19760
19770
19781
19790
19800
19810
19821
19831
19841
19852
198682
198738
198888
198965
1990114
1991208
199284
199378
199444
199534
199621
199738
199832
199919
200033
200185
200223
200344
200444
200542
200616
200724
200820
200920
201028
201138
201242
201341
201441
201543
201641
201739
20180
20190
Total1702