Makeup of Korean Vocabulary:

1) Native Korean words

2) Sino-Korean words

3) Loan Words

큰사전 (1947)
(Big Dictionary)
한국어대사전 (1976)
(Great Korean Dictionary)
Sohn (1999)
Sohn (2006)
Native Korean
45%
41%
35%
30%
Sino-Korean
52%
54%
60%
65%
Loan Words
3%
5%
5%
5%

[Source: Sohn (1994)]