*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19911
199219
19937
199435
199556
199664
199723
199816
19991
20001
20015
200248
200375
20045
20055
200615
20078
200813
200957
20105
20115
201212
20137
201419
201515
2016284
2017124
20181
20197
2020147
202112
2022591
2023668
20242
Total2354