*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19732
19740
19756
19768
19770
19784
19797
19803
19815
19826
19835
19843
19852
19863
19873
19884
19893
199011
19917
19924
19934
199420
199531
199645
199774
199864
1999107
200068
200180
2002124
2003162
200482
2005144
2006173
2007104
200878
2009134
2010217
2011131
2012149
2013101
2014106
201595
201624
20170
20180
Total2404