*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19941
19951
19969
199716
19985
19997
20009
20016
20022
20030
20040
200512
20065
20078
20089
200915
201014
20113
201215
20130
20141
20154
201666
2017147
2018124
20190
202066
20212
20223
202310
20240
Total560