Encode-Sans already includes THIN SPACE (U+2009) and NO-BREAK SPACE (NBSP; U+00A0), but does not include a narrow no-break space (U+202F), which could have the same width as a thin space. As a technical writer, I use NNBSP frequently to conserve space in tabular data. NNBSP is also important for some languages (e.g., French).