*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
19720
19730
19740
19750
19760
19770
19780
19791
19802
19810
19820
19830
19841
19850
198610
19870
19889
19890
19900
19910
199211
199310
19946
19956
19966
199719
19980
19993
20001
200110
20022
20038
20044
200512
20068
20073
20086
20098
201012
201116
201213
201327
201431
201539
201643
201772
201874
201967
202095
2021132
2022140
2023125
202414
Total1047