*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19902
19910
19922
19933
19940
19950
19964
19971
19982
19991
20000
20011
20022
20033
20045
20054
200616
200713
200825
20090
20100
20116
201216
20136
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total112