*Excludes Observations that spanned multiple years

Pre 19705
19700
19711
19720
19731
19740
19750
19760
19771
19780
19790
19800
19810
19820
19830
19843
198552
198632
198757
1988154
198920
199055
199158
199240
199356
199443
1995125
199635
199735
19984
199941
200053
20018
20026
200364
200470
200548
200672
200772
200881
200981
201098
201185
201284
2013102
201483
201580
201684
201773
201867
201965
202032
202157
202257
20233
20240
Total2343