*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
199213
199317
19944
199512
19960
19970
19982
19991
20000
20010
20020
20033
20042
20051
20066
200718
20084
20096
20106
20115
201210
20135
20147
20152
20168
201712
201811
201915
202015
20217
202215
20233
20242
Total213