*Excludes Observations that spanned multiple years

Pre 197014
19700
19710
19720
19730
19740
19750
19761
19770
19780
19790
19803
19816
19821
19832
19840
19850
19862
19870
19880
19890
19903
19912
19922
19930
19940
19951
19961
19971
19980
19991
20000
20010
20028
20031
20048
20050
20060
20076
200847
200910
20100
20110
20120
20131
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20241
Total122