*Excludes Observations that spanned multiple years

Pre 19708
19700
19712
197210
19733
197410
19757
19761
19770
19783
19793
198012
198125
198216
198324
198435
198537
198635
198722
198824
198922
199071
199145
199234
199322
199448
199552
199683
199740
199869
199947
200031
2001101
200270
200371
200450
200551
200669
200748
200867
200993
201065
201184
201255
201346
201431
20150
20160
20170
Total1742