*Excludes Observations that spanned multiple years

Pre 19701
19700
19712
19720
19730
19740
19750
19761
19771
19781
19791
19800
19810
19820
19832
19840
19859
19866
19871
19882
198921
199013
199119
199226
1993100
199495
1995173
199689
199766
19985
19996
200016
200124
200217
200314
20048
200522
200614
200711
200813
20098
201014
201112
201220
201315
201412
201516
201619
20177
20181
20190
20200
20210
Total903