Oman's major imports and exports in a table:

Import Category Approximate Percentage of Total Imports:

1. Machinery and Equipment 20% - 25%, 
2. Transportation Equipment 15% - 20%, 
3. Chemicals and Chemical Products 10% - 15%, 
4. Mineral Fuels and Oils 10% - 15%, 
5. Electrical Machinery and Equipment 5% - 10%, 
6. Metals (Iron and Steel) 5% - 10%,  
7. Plastics and Plastic Products 5% - 10%, 
8. Textiles and Apparel 5% - 10%

Export Category Approximate Percentage of Total Exports:

1. Oil and Gas Products 80% - 85%, 
2. Minerals (Copper, etc.) 5% - 10%, 
3. Fish and Seafood 3% - 5%, 
4. Dates 1% - 3%, Chemicals and Petrochemicals 1% - 3%, 
5. Textiles and Apparel 1% - 2%, 
6. Metals (e.g., Aluminum) 1% - 2%

Please note that these percentages are approximate and can vary based on market conditions, economic factors, and changes in Oman's trade composition. For the most accurate and current information, it is advisable to refer to the latest trade statistics or official reports from Omani authorities.