*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19751
19760
19770
19780
19791
19800
19811
19820
19830
19840
19850
19860
19871
19883
19890
19902
19914
19924
19937
19940
19954
19966
199710
19983
19997
200011
20011
20023
20030
20040
20050
20060
20071
20081
20092
20101
20111
20120
20131
20140
20150
20160
20170
20180
20190
20200
20210
20220
20233
20240
Total81