*Excludes Observations that spanned multiple years

Pre 1970242
197013
19712
19723
19735
19741
19759
19761
19772
19782
19793
19801
19813
19820
19832
19840
19854
19861
19870
19880
19890
19900
19910
19920
19930
19945
19950
19962
19974
19982
19995
20001
20012
20027
20033
20041
200526
200677
200719
20083
200919
201026
201118
201210
201380
20143
20152
20160
20172
Total611