*Excludes Observations that spanned multiple years

Pre 197045
19700
19710
19720
19731
19740
19751
19761
19773
19781
19790
19800
19810
19820
19830
19840
19850
19861
19870
19880
19896
19900
19913
19921
19934
19940
19955
199617
19970
19980
19990
20000
20012
20020
20036
20040
20050
20060
20072
20081
20090
20100
20110
20121
20133
20140
20150
20163
20170
20180
20190
20200
20210
20220
20230
20240
Total107