*Excludes Observations that spanned multiple years

Pre 19702
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
198713
19883
19890
19901
19915
19920
19930
19940
199511
19960
19970
19982
199940
200045
20015
20027
20030
20040
20050
20060
20070
20080
20090
20104
20110
20121
20132
20140
20152
20164
20174
20182
20195
20200
20213
20224
20230
20240
Total166