Oil import nigeria lessen amount to 60 percent by 2018

I think there may be a small mistake in your statement. Nigeria is actually a major oil producer, not an oil importer. In fact, Nigeria is the largest oil producer in Africa and the 12th largest oil producer in the world.

According to the Nigerian National Petroleum Corporation (NNPC), Nigeria's oil production has been fluctuating over the years, but it has not been an importer of oil. In 2018, Nigeria's oil production averaged around 1.9 million barrels per day (mb/d).

However, if you meant to say that Nigeria's dependence on oil imports has decreased, that's a different story. Nigeria has been working to diversify its economy and reduce its reliance on oil exports. In 2018, the country's oil exports accounted for around 90% of its total exports, but the government has set a target to reduce this to 70% by 2025.

To achieve this goal, Nigeria has been investing in its non-oil sectors, such as agriculture, manufacturing, and services. The country has also been exploring alternative sources of energy, including natural gas and renewable energy.

So, to summarize, Nigeria is not an oil importer, but it has been working to reduce its dependence on oil exports and diversify its economy.