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*Excludes Observations that spanned multiple years

Pre 197032
19701
19712
19720
19730
19743
19750
19761
19771
19782
19792
19802
19812
19821
19832
19840
19850
19860
19875
19883
198924
19900
19917
19925
19931
19942
199512
19964
19979
199812
199915
2000246
200184
2002429
20031564
2004464
2005487
20061549
2007675
2008664
20095627
20101005
20111135
2012418
20131697
20141530
2015232
2016658
2017771
2018329
2019379
20207
20210
Total20100