*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19871
19888
19890
19902
199183
199226
199315
19943
199537
19963
19971
199812
19991
20001
20011
20021
20030
20041
20056
20064
20071
20082
20093
20100
201112
20122
20131
20142
20150
20162
20173
20183
20195
20205
20214
202213
202333
202434
Total332