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*Excludes Observations that spanned multiple years

Pre 19700
19701
19719
1972139
197357
19740
19750
19760
19773
197812
19797
19803
19810
19823
19830
198441
198589
1986154
1987209
1988698
198986
1990226
1991384
1992205
1993339
1994348
1995246
1996123
199736
199851
199927
200035
200112
200230
2003111
2004106
2005108
200696
200786
2008123
2009142
201096
2011100
2012184
2013163
2014107
2015120
2016108
201796
20183
20191
20200
20210
Total5323