*Excludes Observations that spanned multiple years

Pre 19703
19701
19710
19720
19730
19741
19750
19760
19775
19780
19790
19800
19810
19820
19830
19841
19854
19868
19878
198880
19894
19904
1991113
1992117
199370
199422
199528
199613
19978
19984
199955
200058
200152
200222
20039
200457
20053
200610
200773
20086
20093
20103
20116
20121
201318
20144
20152
201613
20176
20185
201911
20200
20210
20220
Total911