*Excludes Observations that spanned multiple years

Pre 19707
19700
19714
19720
19730
19740
19750
19761
19776
19780
19792
19801
19815
19821
19832
19841
198517
19863
198730
1988132
19896
19908
1991128
1992193
1993184
199470
1995208
199676
199726
199839
199956
200049
2001165
200257
200330
200449
200524
200639
200762
200859
200928
201095
201199
201259
201370
201478
201561
201685
201790
201847
201998
202053
202169
202249
202365
20243
Total2789