*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19861
19872
19883
19890
19900
19910
19922
19933
19943
199515
199611
19970
19980
19994
20000
20010
20024
20030
20044
20051
20060
20071
20088
20093
20100
20110
20120
20130
20142
20150
20160
20172
20180
20191
20200
20211
20226
20231
20241
Total81