*Excludes Observations that spanned multiple years

Pre 197020
19700
19710
19722
19732
19740
19752
19761
19770
19780
19794
19802
19812
19820
19831
19841
19851
19860
19873
19880
19891
19900
19910
19922
19931
19941
19954
19969
19977
19980
19992
20003
200111
20023
20034
20044
200511
20063
20073
20082
200980
201091
201118
20124
20138
201423
20155
20165
20176
20181
20194
20200
20210
Total357