*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19921
19931
19940
19950
19960
19970
19980
19990
20000
20010
200212
20037
200411
200510
200639
20078
200864
2009456
201058
2011123
201225
2013213
2014122
20150
201674
2017487
2018263
20198
202041
202196
20220
20230
20240
Total2120