*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19735
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19841
19850
19864
19878
19880
19894
19903
19910
19927
19930
19940
199516
19960
19970
19983
19995
20004
20011
20020
20030
20040
20051
20060
20079
200812
200913
2010114
201187
2012425
201335
2014132
2015386
2016898
2017114
2018185
2019310
2020260
2021305
2022288
2023204
20240
Total3840