Percentage of 2004 Operating Income*

5/2/2005


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Table of Contents

Percentage of 2004 Operating Income*

Diluted Earnings Per Share

Return on Equity

Significant Noteworthy Items Impacting Earnings*

Gas Distribution Operating Income (Millions)

Gas Distribution Operating Income – W/O Mercury-related Impacts (Millions)

Pretax Mercury-Related Reserve Impacts (Millions)

Pretax Mercury-Related Net Recoveries (Millions)

Tropical Shipping Operating Income (Millions)

Other Energy-Related Ventures Operating Income (Millions)

Declared Dividends

Common Shares Outstanding (Millions)

Capital Expenditures (Millions)

Capital Structure

Nicor Gas Profile

Nicor Gas Efficiency Measures*

Nicor Gas Total Deliveries (Bcf)

Nicor Gas Customer Mix (% of 2004 Deliveries)

Electric Power Generation Deliveries (Bcf)

Customer Choice at Nicor Gas

Tropical Shipping Profile

Tropical Shipping Business Background

Tropical Shipping Volumes (TEUs 000s)

Other Energy-Related Ventures - Wholesale Energy Services

Other Energy-Related Ventures - Wholesale Energy Services

Other Energy-Related Ventures - Retail Services

Author: Mike O'Mary