*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19820
19830
19840
19855
19860
19870
19888
19892
19904
19919
19928
19933
19946
19951
19961
19972
19984
19996
20004
20015
20022
200310
200410
20055
200616
200719
200829
200910
20107
201118
201220
20135
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total220