*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19723
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19946
19956
19966
19976
199811
199923
200067
2001156
2002129
2003375
2004407
2005277
2006113
2007121
200861
200954
2010153
2011125
2012180
201392
2014107
2015128
201699
201789
201861
20190
20200
20210
20220
20230
20240
20250
Total2855