expressed interests to proposal vs expressed interests in proposal

Some examples from the web:

• During the recent Information Day on the above-mentioned 2005 Work Plan organised by the Commission, several institutes expressed an interest to submit a proposal in this field.
• Constituents have already expressed interest in this proposal, which could build on existing schemes run by local authorities and schools.
• I proposed this to Commissioner Potočnik at his first hearing with our Parliament's Committee on Industry, Research and Energy, and he expressed interest in the proposal and promised to study it.
• Since his wife's expressed interest in you...
• Otherwise, Aaron Sorkin has expressed interest in working with Atticus.
• They've expressed interest in the naming rights.
• There's a man at my church who expressed interest in spending time with me, socially.
• One of the girls expressed interest in the Frederic Remington bust.
• I'm glad you finally expressed interest in befriending our cause.
• Bud Grossman has expressed interest in representing me.
• I should let you know that he expressed interest in asking you out.
• Several Mediterranean Countries have expressed interest in deepening and/or widening their trade agreements with the EU.
• I'm glad you finally expressed interest in befriending our cause.
• My records indicate you've expressed interest in losing some weight.
• Ma'am, you have expressed interest in the interior workings of Starship UK.
• Two countries - Ukraine and Moldova - have also expressed interest in joining.
• Ukraine has expressed interest and its internal decision-making process is under way.
• Several Member States expressed interest in participating in such a project.
• Director-General shall ensure a balanced representation of all expressed interests referred to in paragraph 2.
• The exporting producer expressed interest in an undertaking within the statutory deadlines.

Some examples from the web:

• Constituents have already expressed interest in this proposal, which could build on existing schemes run by local authorities and schools.
• I proposed this to Commissioner Potočnik at his first hearing with our Parliament's Committee on Industry, Research and Energy, and he expressed interest in the proposal and promised to study it.
• Since his wife's expressed interest in you...
• Otherwise, Aaron Sorkin has expressed interest in working with Atticus.
• They've expressed interest in the naming rights.
• There's a man at my church who expressed interest in spending time with me, socially.
• One of the girls expressed interest in the Frederic Remington bust.
• I'm glad you finally expressed interest in befriending our cause.
• Bud Grossman has expressed interest in representing me.
• I should let you know that he expressed interest in asking you out.
• Several Mediterranean Countries have expressed interest in deepening and/or widening their trade agreements with the EU.
• I'm glad you finally expressed interest in befriending our cause.
• My records indicate you've expressed interest in losing some weight.
• Ma'am, you have expressed interest in the interior workings of Starship UK.
• Two countries - Ukraine and Moldova - have also expressed interest in joining.
• Several Member States expressed interest in participating in such a project.
• The exporting producer expressed interest in an undertaking within the statutory deadlines.
• The Navy has expressed interest in 1 of his cases, commissioned by the widow of a Marine.
• Dr. Barkley expressed interest in a specialist in sonoluminescence.
• The Member States have already expressed interest in the EVS, and several of them are beginning to devise national initiatives.