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* This question was phrased by the source as follows: "In what way does your household connect to the internet? - using a dial-up connection, for example via telephone line or ISDN. - Through a broadband connection, such as via television cable, telephone line (ADSL or VDSL), fiber, satellite or hotspot. - With a mobile connection, via a mobile phone, smartphone or a dongle."

The source defines the education levels as follows:

• Low education level: "Primary education, VMBO (preparatory middle-level vocational education), first three years of Havo/VWO (higher general and pre-university secondary education), or assistant education (MBO-1)"
• Mid education level: "Last years of Havo/VWO, MBO2, 3 and 4 (middle applied education)"
• High education level: "HBO (higher applied education) and WO (university studies) and older educational programs which are comparable."

Moreover, the source notes generally there is a high amount of 'don't know' answers for this survey question. The source states: "Therefore households are asked as well if they have an multiplay package."

The definition of broadband internet according to the source: "A charged fixed internet connection such as ADSL, cable (fiber) or a mobile phone connection with a minimum of 3G or higher, such as UMTS or a SIM card or USB key, or if the respondents have an multiplay package. Lastly, any remaining unknown answers about the availability of a broadband internet connection are being verified by the activities of the respondents on the internet."