*Excludes Observations that spanned multiple years

Pre 19708
19701
19711
19720
19731
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19853
19860
19876
198813
19894
19907
199115
199213
19937
19948
199521
199629
199726
19983
199934
200018
20019
20021
20037
20041
20051
200618
20076
20085
20090
201024
20119
20127
201311
20147
20154
201618
20176
20183
201911
202010
20215
20229
20233
20240
Total393