The Excel sheet contains data for each of the investigated proficiency levels
of L2 English (i.e., A1, A2, B1, B2, C1). Each separate profiiency data sheet
is set up the same way:

1. the first column contains the words that are added to a lexicon at the
specific proficiency level. At the A1 level, these words undergo the maximal
number of growth spurts as they age in the lexicon. At the C1 level, the newly
learned words only undergo one growth spurt (to C2).

2. Next, the raw number of phonological neighbors that exist within a given
proficiency level are listed.

3. The proportions of known words at a given proficiency level are calculated
in relation to the maximal number of neighbors known at the last L2 proficiency
level C2. So, C2 words/ neighbors represent 100%.

4. The average weighted degrees of words at the different proficiency levels
are listed in the next few columns.

5. The Clearpond-ENGLISH data base was used to determine the L1-given maximal
neighborhood density of each word.

6. Lastly, the proportion of neighbors known at each proficiency level in
relation to the L1 number of neighbors is calculated for each word. This feeds
the saturation analysis. A saturation of 100% indicates that the L2 learners at
a given proficiency level and for a given word have acquired all words that
exist in the L1 lexicon for a given neighborhood.