*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19840
19850
19860
19870
19880
19892
19900
19911
19920
19937
19940
19951
19960
19970
19980
19990
20001
20010
20020
20030
20040
20050
20060
20070
20082
20091
20101
20112
20125
201310
20142
20153
20165
20172
20185
20194
20200
20210
20220
20230
20240
Total56