awards. The effective income tax rate in the 2020 thirteen-week period of 23.9% was lower than the 24.2% estimated annual effective income tax rate primarily due to excess tax benefits recognized on stock-based compensation arrangements in the 2020 thirteen-week period. The effective income tax rate in the 2019 thirteen-week period of 23.8% was lower than the 24.2% estimated annual effective income tax rate primarily due to excess tax benefits recognized on stock-based compensation arrangements in the 2019 thirteen-week period.
Net income was $61,886,000, or $1.61 per common share ($1.61 per diluted share), in the 2020 thirteen-week period. Net income attributable to the Company was $53,255,000 or $1.35 per common share ($1.35 per diluted share), in the 2019 thirteen-week period.
CAPITAL RESOURCES AND LIQUIDITY
Working capital and the ratio of current assets to current liabilities were $420,519,000 and 1.8 to 1, respectively, at September 26, 2020, compared with $444,984,000 and 1.8 to 1, respectively, at December 28, 2019. Landstar has historically operated with current ratios within the range of 1.5 to 1 to 2.0 to 1. Cash provided by operating activities was $185,548,000 in the 2020 thirty-nine-week period compared with $260,714,000 in the 2019 thirty-nine-week period. The decrease in cash flow provided by operating activities was primarily attributable to the timing of collections of receivables and decreased net income, partially offset by the timing of payments of accounts payable.
The Company declared and paid $0.58 per share, or $22,495,000 in the aggregate, in cash dividends during the thirty-nine-week period ended September 26, 2020 and, during such period, also paid $78,947,000 of dividends payable which were declared during fiscal year 2019 and included in current liabilities in the consolidated balance sheet at December 28, 2019. The Company declared and paid $0.515 per share, or $20,589,000 in the aggregate, in cash dividends during the thirty-nine-week period ended September 28, 2019. During the thirty-nine-week period ended September 26, 2020, the Company purchased 1,178,970 shares of its common stock at a total cost of $115,962,000. During the thirty-nine-week period ended September 28, 2019, the Company purchased 849,068 shares of its common stock at a total cost of $88,578,000. As of September 26, 2020, the Company may purchase in the aggregate up to 1,821,030 shares of its common stock under its authorized stock purchase program. Long-term debt, including current maturities, was $87,293,000 at September 26, 2020, $25,551,000 lower than at December 28, 2019.
Shareholders’ equity was $705,634,000, or 89% of total capitalization (defined as long-term debt including current maturities plus equity), at September 26, 2020, compared to $721,469,000, or 86% of total capitalization, at December 28, 2019. The decrease in equity was primarily the result of purchases of shares of the Company’s common stock and dividends declared by the Company in the 2020 thirty-nine-week period, partially offset by net income.
On June 2, 2016, Landstar entered into a credit agreement with a syndicate of banks and JPMorgan Chase Bank, N.A., as administrative agent, which was amended and restated on August 18, 2020 to extend the maturity date to August 2023 and amend certain other terms (as so amended and restated, the “Credit Agreement”). The Credit Agreement provides $250,000,000 of borrowing capacity in the form of a revolving credit facility, $35,000,000 of which may be utilized in the form of letters of credit. The Credit Agreement includes an “accordion” feature providing for a possible increase up to an aggregate borrowing capacity of $400,000,000.
The Credit Agreement contains a number of covenants that limit, among other things, the incurrence of additional indebtedness. The Company is required to, among other things, maintain a minimum Fixed Charge Coverage Ratio, as defined in the Credit Agreement, and maintain a Leverage Ratio, as defined in the Credit Agreement, below a specified maximum. The Credit Agreement provides for a restriction on cash dividends and other distributions to stockholders on the Company’s capital stock to the extent there is a default under the Credit Agreement. In addition, the Credit Agreement under certain circumstances limits the amount of such cash dividends and other distributions to stockholders to the extent that, after giving effect to any payment made to effect such cash dividend or other distribution, the Leverage Ratio would exceed 2.5 to 1 on a pro forma basis as of the end of the Company’s most recently completed fiscal quarter. The Credit Agreement provides for an event of default in the event that, among other things, a person or group acquires 35% or more of the outstanding capital stock of the Company or obtains power to elect a majority of the Company’s directors or the directors cease to consist of a majority of Continuing Directors, as defined in the Credit Agreement. None of these covenants are presently considered by management to be materially restrictive to the Company’s operations, capital resources or liquidity. The Company is currently in compliance with all of the debt covenants under the Credit Agreement.
At September 26, 2020, the Company had no borrowings outstanding and $33,618,000 of letters of credit outstanding under the Credit Agreement. At September 26, 2020, there was $216,382,000 available for future borrowings under the Credit Agreement. In addition, the Company has $59,434,000 in letters of credit outstanding as collateral for insurance claims that are secured by investments totaling