20,000
20,000
51,000
51,000
52,000
52,000
53,000
53,000
54,000
54,000
55,000
55,000
57,000
57,000
44,000
44,000
38,000
38,000
39,000
39,000
41,000
41,000
27,000
27,000
28,000
28,000
14000
14000
64,000
64,000
60,000
60,000
61,000
61,000
59,000
59,000
May, 1981
May, 1981
July, 1981
July, 1981
August, 1981
August, 1981
April, 1982
April, 1982
June, 1982
June, 1982
August, 1982
August, 1982
December, 1982
December, 1982
January, 1983
January, 1983
February, 1983
February, 1983
August, 1983
August, 1983
June, 1984
June, 1984
October, 1984
October, 1984
