Their rate are too low vs Their rate is too low

Some examples from the web:

• With rare exceptions, birth rates are low.
• Their catalyzation rate is too low.
• What we are seeing now is an inexorable correction to the years of easy credit created by these same governments which kept interest rates too low for too long.
• On the EU economy, he stressed that Europe's growth rates were too low.
• Accordingly, when interest rates are low, they are the main criterion for measuring the sustainability of short-term debt.
• The ex-post control error rates are low for EACEA and well below the limit of 2 %.
• That rate is much too low From what we'd expect from this collision.
• We are aware that our growth rates are relatively low.
• In retrospect, it is clear that the euro-wide uniform key interest rates were too low for Spain, which gave rise to an enormous property bubble.
• On the EU economy, he stressed that Europe's growth rates were too low.
• Because the government kept interest rates too low for too long!
• The Federal Reserve kept interest rates too low for too long and thereby essentially provided a credit subsidy.
• For some years we have been enjoying abundant liquidity in the financial markets, interest rates are low and memories of monetary crises and volatile exchange rates are fading in Europe.
• Unfortunately, very low implementation rates are also likely for 2001.
• The low pay rates are also explained by the continued existence of child labour.
• I agree with the Commissioner that good public finances and low interest rates are good for growth.
• Inflation and interest rates are at very low levels, and public deficits have considerably shrunk.
• Both nominal and real interest rates are at exceptionally low levels, lending ongoing support to economic activity.
• Inflation rates are historically low, as are interest rates.
• Interest rates are low, inflation low and stable, and in many European nations, the level of unemployment is on its way down.

Some examples from the web:

• Their catalyzation rate is too low.
• Believes that intelligent vehicle systems can help to reduce congestion, pollution and the number and seriousness of road accidents, but that their market penetration rate is still too low;
• That rate is much too low From what we'd expect from this collision.
• At 2.7%, the official unemployment rate is low.
• Frankly, at present, the overall recovery rate is low.
• The mortality rate is low in pigs and recovery usually occurs within 7-10 days.
• What we are seeing now is an inexorable correction to the years of easy credit created by these same governments which kept interest rates too low for too long.
• On the EU economy, he stressed that Europe's growth rates were too low.
• Its proposed premium period of ten years is far too short and its proposed grant rate is too low.
• Even though the success rate is low, That is the only treatment of choice.
• In comparison with the United States and Japan, the EU labour force participation rate is low.
• We also took into account the airlines in the new Member States, where the mobility rate is low at present but is growing quickly.
• It is good for financial resources to be repaid to the Member States when the implementation rate is low in the Structural Funds.
• In retrospect, it is clear that the euro-wide uniform key interest rates were too low for Spain, which gave rise to an enormous property bubble.
• On the EU economy, he stressed that Europe's growth rates were too low.
• Actually, the mortality rate is quite low.
• Approximately one sixth of the EU's active population are disabled, but their employment rate is comparatively low.
• Because the government kept interest rates too low for too long!
• The Federal Reserve kept interest rates too low for too long and thereby essentially provided a credit subsidy.
• The benign scenario of low inflation and low interest rates is a resounding tribute to the countries entering EMU.