*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19931
19941
19950
19960
19971
19980
19992
20000
20011
20021
2003417
2004159
2005170
20068
200718
200825
2009156
20105
20113
20124
20132
20140
20155
201631
201740
20180
Total1050