*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19720
19730
19741
19750
19760
19770
19780
19790
19800
19811
19820
19830
19840
19850
19863
19870
19884
19892
19905
199112
199216
199330
19947
199519
19963
19970
19980
19992
20000
20014
20020
20031
20041
20052
20065
200714
20084
200914
20108
20118
20127
20134
20141
20155
20168
20177
20186
20193
20204
20218
20224
20231
20241
Total226