*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19761
19770
19780
19794
19800
19811
19821
19833
19841
19858
19865
19871
19881
19893
19904
19910
19923
19932
19945
19952
19964
19976
19984
19995
200027
200131
200224
200365
200475
200593
200661
200730
200816
200920
201065
201145
201229
201325
201418
201534
20162
20170
20180
Total724