*Excludes Observations that spanned multiple years

Pre 19701
19700
19713
19722
19730
19740
19750
19761
19770
19781
19791
19802
19810
19823
19830
19841
19852
19861
19875
198853
1989143
199033
1991105
199230
1993328
1994196
1995135
1996356
1997414
199875
199935
200011
200112
200213
2003179
2004182
2005211
2006181
2007197
2008181
2009199
2010189
2011188
2012229
2013186
2014197
2015201
2016183
2017162
20181
Total4828