*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19921
19931
19940
19951
19962
19971
19981
19992
20000
20011
20020
2003520
200412
2005268
200660
200723
200833
200932
2010513
201117
201238
201312
201452
201526
201650
201714
20184
201914
20208
20219
202210
20238
20242
Total1736