*Excludes Observations that spanned multiple years

Pre 197046
19700
19710
19721
19730
19740
19751
19761
19771
19783
19790
19800
19810
19821
19830
19840
19850
19861
19870
19880
19890
19900
19913
19921
19934
19940
199516
199656
1997118
19980
19994
20000
20010
20021
20032
20041
20050
20060
20070
20080
20090
20100
20110
20121
20130
20140
20150
20160
20170
20180
20190
20200
20213
20220
20230
20240
Total265