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Accumulated Depreciation
<br />� Ba=ance Balance
<br />1/1/74 Additions Disposals 12/31/79
<br />$ 84,035 $ 1,582 $ 14,881 $ 70,737
<br />$ 126,568 $ 7,466 $ 134,034
<br />27,1S1 2,283 29,464
<br />53,687 9,287 $ 8,584 54,090
<br />1,439,775 88,250 1,528,025
<br />$1,647,2i1 $ 107,286 $ 8,884 $1,745,613
<br />$ 181,137 $ 20,778 $ 201,915
<br />280,863 27,669 308,532
<br />19,016 7,161 $ 7,075 19;102
<br />1,094,501 82,633 1,177,134
<br />$1,575,57.7 $ 138,241 $ 7,075 $1,706,683
<br />$ 1&,E33 $ 2,967
<br />30,285 983
<br />$ 49,118 $ 3,950
<br />$ 21,800
<br />31,268
<br />$ 53,068
<br />$ 94,5l0 $ 10,374 $ 105,444
<br />83,930 7,842 $ 27,486 64,286
<br />$ 1Z8,500 $ 15,716 $ 27,486 $ 169,730
<br />53,534 382 S 269,775 S 58,326 $3,745,831
<br />63
<br />Book
<br />Va1ue
<br />$ 3,047
<br />$ 164,610
<br />4,758
<br />15,061
<br />5,640,328
<br />19,114
<br />$ 5,843,871
<br />$ 612,685
<br />245,214
<br />30,300
<br />7,207,709
<br />2,482
<br />$ 8,098,390
<br />$ 199,176
<br />99;331
<br />53,860
<br />5,358
<br />$ 357,725
<br />$ 85,238
<br />22,058
<br />332,269
<br />170,767
<br />69,585
<br />$ 679,917
<br />514,982,950
<br />
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