*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19791
19800
19810
19820
19832
19840
19853
19867
19874
198886
19894
199011
1991137
1992186
199330
199415
199544
199665
199711
19980
19992
20002
200116
200221
200317
200422
20055
200622
20075
20082
20095
20100
20111
20121
20131
20141
20152
20161
20171
20181
20190
20201
20211
20220
20230
20240
Total737