As of December 31,
As of December 31,
2019
2018
Equity securities - U.S. holdings(1)
$24,586
$20,469
Equity funds - U.S. holdings(1) (7)
—
54
Bond funds - government(4) (7)
33,991
19,146
Bond funds - other(5) (7)
207,901
202,393
Real estate(6) (7)
2,979
2,652
Cash and cash equivalents(2)
5,700
5,866
Partnerships(3)
7,539
9,172
Total fair value of plan assets
$282,696
$259,752
notes to consolidated financial statements -in thousands except for share and per share data .
we employ a liability-driven investment strategy whereby a mix of equity and fixed-income investments are used to pursue a derisking strategy which over time seeks to reduce interest rate mismatch risk and other risks while achieving a return that matches or exceeds the growth in projected pension plan liabilities .
risk tolerance is established through careful consideration of plan liabilities and funded status .
the investment portfolio primarily contains a diversified mix of equity and fixed-income investments .
other assets such as private equity are used modestly to enhance long-term returns while improving portfolio diversification .
investment risk is measured and monitored on an ongoing basis through quarterly investment portfolio reviews annual liability measurements and asset / liability studies at regular intervals .
the following table summarizes the fair values of our pension plan assets : .
-1 comprised of common stocks of companies in various industries .
the pension plan fund manager may shift investments from value to growth strategies or vice-versa from small cap to large cap stocks or vice-versa in order to meet the pension plan ' s investment objectives which are to provide for a reasonable amount of long-term growth of capital without undue exposure to volatility and protect the assets from erosion of purchasing power .
-2 comprised of investment grade short-term investment and money-market funds .
-3 comprised of partnerships that invest in various u .
s .
and international industries .
-4 comprised of long-term government bonds with a minimum maturity of 10 years and zero-coupon treasury securities - " treasury strips " with maturities greater than 20 years .
-5 comprised predominately of investment grade u .
s .
corporate bonds with maturities greater than 10 years and u .
s .
high-yield corporate bonds ; emerging market debt -local currency sovereign bonds u .
s .
dollar-denominated sovereign bonds and u .
s .
dollar-denominated corporate bonds ; and u .
s .
bank loans .
-6 comprised of investments in securities of u .
s .
and non-u .
s .
real estate investment trusts -reits real estate operating companies and other companies that are principally engaged in the real estate industry and of investments in global private direct commercial real estate .
investments can be redeemed immediately following the valuation date with a notice of at least fifteen business days before valuation .
-7 comprised of investments that are measured at fair value using the nav per share practical expedient .
in accordance with the provisions of asc 820-10 these investments have not been classified in the fair value hierarchy .
the fair value amount not leveled is presented to allow reconciliation of the fair value hierarchy to total fund pension plan assets .

Question: Which years does the table provide information for the fair values of the company's pension plan assets?
Answer: 2019 2018