For example, Solomon Islands and Marshall Islands are both reported to have 39% and 40% internet usage, but Marshall Islands has 64% Facebook usage and Solomon Islands only 27%. In contrast to Facebook usage, which is an estimation of monthly active users from actual data created by users, internet usage is estimated over a three-month period from ICT household surveys, and in some countries internet usage data has a lag (see the data notes at the end of this post). PNG, Timor-Leste, Solomon Islands, Vanuatu, Micronesia, and Samoa are lower-middle income; Fiji, Marshall Islands, American Samoa, Tonga, and Tuvalu are upper-middle income; Nauru, New Caledonia, Guam, French Polynesia, the Northern Mariana Islands, Cook Islands, and Niue are high-income.