Three Months Ended   
                          -------------------- 
                              (unaudited)                    Year Ended December 31
                          March 31,  March 31,  -------------------------------------------------
                            2000       1999       1999      1998      1997      1996      1995
                          ---------  ---------  --------- --------- --------- --------- ---------

Per Share Operating
 Performance
Net asset value,
 beginning of period        $39.48     $34.30     $34.30    $41.46    $37.09    $31.51    $26.84
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Net investment income         0.08       0.14       0.72      0.82      0.77      0.79      0.86
Net realized gains and
 change in unrealized
 appreciation
 (depreciation) and
 other changes                4.49       1.34       6.79     (5.69)     5.93      6.93      5.90
-------------------------------------------------------------------------------------------------
Total from investment
 operations                   4.57       1.48       7.51     (4.87)     6.70      7.72      6.76
Less distributions
Dividends from net
 investment income           (0.07)     (0.10)     (0.72)    (0.78)    (0.77)    (0.82)    (0.87)
Distributions from net
 realized gains              (0.13)     (0.10)     (1.61)    (1.51)    (1.56)    (1.32)    (1.22)
-------------------------------------------------------------------------------------------------
Total distributions          (0.20)     (0.20)     (2.33)    (2.29)    (2.33)    (2.14)    (2.09)
-------------------------------------------------------------------------------------------------
Net asset value, end of
 period                     $43.85     $35.58     $39.48    $34.30    $41.46    $37.09    $31.51
=================================================================================================
Per share market price,
 end of period              $36.00     $32.625    $32.25    $30.625   $36.50    $34.75    $28.25
Total Investment Return
Based on market price        12.3%       7.3%      13.3%    (10.0)%    11.7%     31.2%     20.5%
Based on net asset value     11.7%       4.4%      23.8%    (11.1)%    18.9%     25.5%     26.5%
Ratios/Supplemental Data
Net assets, end of
 period (in 000's)        $610,213   $492,537   $565,075  $474,821  $556,453  $484,589  $401,405
Ratio of expenses to
 average net assets           0.84%+     0.54%+     0.43%     0.31%     0.47%     0.63%     0.57%
Ratio of net investment
 income to average net
 assets                       0.75%+     1.72%+     1.86%     2.13%     1.91%     2.31%     2.89%
Portfolio turnover            4.08%+     9.33%+    11.89%    12.70%    13.09%    15.50%    15.86%
Number of shares
 outstanding at end of
 period (in 000's)          13,916     13,841     14,314    13,841    13,423    13,066    12,739
    
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+Ratios presented on an annualized basis.