*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
19871
19881
19890
19900
19910
19928
19931
19940
19950
19963
19971
19980
19992
20000
20010
20020
20034
20040
20051
20062
20075
20081
20096
20102
20112
20124
20136
20140
20150
20163
20171
20183
20192
20200
20216
20222
20237
20242
Total78