*Excludes Observations that spanned multiple years

Pre 197026
19701
19710
19720
19731
19741
19751
19761
19772
19780
19790
19802
19810
19821
19832
19843
19852
19860
19870
19880
19890
19900
19910
19922
19930
19940
19952
19961
19973
19981
19990
20003
20010
20020
20031
20040
20052
20060
20072
20082
20090
20103
20110
20120
20131
20141
20150
20160
20170
20181
20190
20201
20210
20220
20231
20241
Total71