*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19862
19872
19880
19890
19900
19912
19922
19935
19941
19952
19960
19970
19980
19993
20001
20010
20020
20032
20041
20050
20061
20071
20083
20091
20104
20117
20120
20132
20141
20150
20161
20174
20183
201910
20200
20210
20220
Total62