*Excludes Observations that spanned multiple years

Pre 197048
19700
19711
19720
19731
19740
19751
19761
19770
19780
19792
19801
19810
19821
19831
19840
19850
198632
198722
198849
198918
19909
199128
199211
199316
199415
199520
199613
199727
19985
199936
2000216
200193
2002259
2003162
200482
200572
2006150
200770
2008276
20091939
2010114
2011200
2012166
2013121
2014197
2015335
2016204
2017199
2018173
201997
20205
20211
Total5489