*Excludes Observations that spanned multiple years

Pre 197016
19702
19711
19720
19731
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19851
19860
19870
19880
19892
19901
19912
19921
19930
19940
19950
19960
19971
19980
19992
20001
20012
20020
200313
20041
20053
20062
20071
20082
20092
20100
201150
2012298
2013398
2014442
2015232
20160
20174
20180
20192
20200
20210
20220
Total1484