*Excludes Observations that spanned multiple years

Pre 19709
19700
19710
19720
19730
19740
19750
19760
197717
19781
19790
19801
19813
19820
19830
19840
19850
19860
19870
19880
19898
19900
19910
19920
19935
19940
19956
199623
1997108
19980
199979
20000
20010
20022
20031
20040
20050
20060
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total263