The amino acids, with their hydrophilic indices, and their naturally occurring probabilities. The larger the index the more the acid wants to be on the outside when the polypeptide folds.

Source :  A. Radzicka and R. Wolfenden, Biochemistry, 27, 1664-1670 (1988)

Abbreviation
 Name
 Hydrophilic index
 Probability
Arg R
 Arginine
 15.86 0.057
Asp
 D
 Aspartic Acid
 9.66 0.053
Glu E
 Glutamic Acid
 7.75 0.062
Asn N
 Asparagine
 7.58 0.044
Lys K
 Lysine
 6.49
 0.057
Gln Q
 Glutamine
 6.48 0.040
His H
 Histidine
 5.60 0.022
Ser
 S
 Serine
 4.34
 0.069
Thr
 T
 Threonine
 3.51
 0.058
Tyr
 Y
 Tyrosine
 1.08
 0.032
Gly
 G
 Glycine
 0.00
 0.072
Pro
 P
 Proline
 -0.01
 0.051
Cys
 C
 Cystine
 -0.34 0.017
Ala
 A
 Alanine
 -0.87
 0.083
 Trp
 W
 Tryptophan
 -1.39
 0.013
Met
 M
 Methionine
 -1.41
 0.024
Phe
 F
 Phenylalanine
 -2.04
 0.039
Val
 V
 Valine
 -3.10
 0.066
Ile
 I
 Isoleucine
 -3.98
 0.052
Leu L
 Leucine
 -3.98
 0.090

The acids in the standard table, with color coding indicating strength of hydrophobicity (red) or hydrophilicity (green).