*Excludes Observations that spanned multiple years

Pre 197043
19700
19712
19720
19730
19740
19751
19761
19770
19781
19790
19800
19811
19821
19831
19840
19852
19863
19870
19885
19890
19902
19910
19922
19930
19944
19952
19965
19972
19980
19990
20000
20011
20020
20032
20040
20050
20060
20071
20082
20092
20100
20111
20124
20138
20140
20150
20161
20170
20180
20190
20200
20210
20220
20230
Total100